20379521652 has 96 divisors (see below), whose sum is σ = 55808535552. Its totient is φ = 5666927616.

The previous prime is 20379521593. The next prime is 20379521653. The reversal of 20379521652 is 25612597302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20379521653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012228 + ... + 1032164.

It is an arithmetic number, because the mean of its divisors is an integer number (581338912).

Almost surely, 2^20379521652 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 20379521652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27904267776).

20379521652 is an abundant number, since it is smaller than the sum of its proper divisors (35429013900).

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

20379521652 is a wasteful number, since it uses less digits than its factorization.

20379521652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20277 (or 20275 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 20379521652 in words is "twenty billion, three hundred seventy-nine million, five hundred twenty-one thousand, six hundred fifty-two".