20415342552 has 128 divisors (see below), whose sum is σ = 56240352000. Its totient is φ = 6124285440.

The previous prime is 20415342523. The next prime is 20415342557. The reversal of 20415342552 is 25524351402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415342557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18677718 + ... + 18678810.

It is an arithmetic number, because the mean of its divisors is an integer number (439377750).

Almost surely, 2^20415342552 is an apocalyptic number.

20415342552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20415342552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28120176000).

20415342552 is an abundant number, since it is smaller than the sum of its proper divisors (35825009448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20415342552 is a wasteful number, since it uses less digits than its factorization.

20415342552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 20415342552 its reverse (25524351402), we get a palindrome (45939693954).

The spelling of 20415342552 in words is "twenty billion, four hundred fifteen million, three hundred forty-two thousand, five hundred fifty-two".