20122553412 has 96 divisors (see below), whose sum is σ = 56212329600. Its totient is φ = 6188282496.

The previous prime is 20122553411. The next prime is 20122553443. The reversal of 20122553412 is 21435522102.

20122553412 is a `hidden beast` number, since 2 + 0 + 122 + 5 + 534 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20122553411) 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, 5135278 + ... + 5139194.

It is an arithmetic number, because the mean of its divisors is an integer number (585545100).

Almost surely, 2^20122553412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122553412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28106164800).

20122553412 is an abundant number, since it is smaller than the sum of its proper divisors (36089776188).

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

20122553412 is a wasteful number, since it uses less digits than its factorization.

20122553412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7602 (or 7594 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20122553412 in words is "twenty billion, one hundred twenty-two million, five hundred fifty-three thousand, four hundred twelve".