20152151620 has 48 divisors (see below), whose sum is σ = 43850318400. Its totient is φ = 7770188160.

The previous prime is 20152151587. The next prime is 20152151641. The reversal of 20152151620 is 2615125102.

It is a super-2 number, since 2×20152151620² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330955 + ... + 387085.

It is an arithmetic number, because the mean of its divisors is an integer number (913548300).

Almost surely, 2^20152151620 is an apocalyptic number.

20152151620 is a gapful number since it is divisible by the number (20) 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 20152151620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21925159200).

20152151620 is an abundant number, since it is smaller than the sum of its proper divisors (23698166780).

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

20152151620 is a wasteful number, since it uses less digits than its factorization.

20152151620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56788 (or 56786 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 20152151620 its reverse (2615125102), we get a palindrome (22767276722).

The spelling of 20152151620 in words is "twenty billion, one hundred fifty-two million, one hundred fifty-one thousand, six hundred twenty".