20826258624 has 112 divisors (see below), whose sum is σ = 61981628640. Its totient is φ = 6942039552.

The previous prime is 20826258623. The next prime is 20826258631. The reversal of 20826258624 is 42685262802.

20826258624 is a `hidden beast` number, since 2 + 0 + 8 + 2 + 62 + 586 + 2 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20826258624.

It is not an unprimeable number, because it can be changed into a prime (20826258623) 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, 65572 + ... + 214364.

Almost surely, 2^20826258624 is an apocalyptic number.

20826258624 is a gapful number since it is divisible by the number (24) 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 20826258624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30990814320).

20826258624 is an abundant number, since it is smaller than the sum of its proper divisors (41155370016).

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

20826258624 is an frugal number, since it uses more digits than its factorization.

20826258624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148826 (or 148798 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 20826258624 in words is "twenty billion, eight hundred twenty-six million, two hundred fifty-eight thousand, six hundred twenty-four".