20526428416 has 72 divisors (see below), whose sum is σ = 44164789760. Its totient is φ = 9465071616.

The previous prime is 20526428411. The next prime is 20526428509. The reversal of 20526428416 is 61482462502.

It is not an unprimeable number, because it can be changed into a prime (20526428411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4933345 + ... + 4937503.

Almost surely, 2^20526428416 is an apocalyptic number.

20526428416 is a gapful number since it is divisible by the number (26) 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 20526428416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22082394880).

20526428416 is an abundant number, since it is smaller than the sum of its proper divisors (23638361344).

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

20526428416 is a wasteful number, since it uses less digits than its factorization.

20526428416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 20526428416 in words is "twenty billion, five hundred twenty-six million, four hundred twenty-eight thousand, four hundred sixteen".