20392851520 has 112 divisors (see below), whose sum is σ = 50196902400. Its totient is φ = 7882997760.

The previous prime is 20392851511. The next prime is 20392851527. The reversal of 20392851520 is 2515829302.

It is a self number, because there is not a number n which added to its sum of digits gives 20392851520.

It is not an unprimeable number, because it can be changed into a prime (20392851527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13976551 + ... + 13978009.

Almost surely, 2^20392851520 is an apocalyptic number.

20392851520 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 20392851520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25098451200).

20392851520 is an abundant number, since it is smaller than the sum of its proper divisors (29804050880).

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

20392851520 is a wasteful number, since it uses less digits than its factorization.

20392851520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 20392851520 in words is "twenty billion, three hundred ninety-two million, eight hundred fifty-one thousand, five hundred twenty".