20826511552 has 168 divisors, whose sum is σ = 53234100288. Its totient is φ = 7992230400.

The previous prime is 20826511547. The next prime is 20826511571. The reversal of 20826511552 is 25511562802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2306727 + ... + 2315737.

Almost surely, 2^20826511552 is an apocalyptic number.

20826511552 is a gapful number since it is divisible by the number (22) 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 20826511552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26617050144).

20826511552 is an abundant number, since it is smaller than the sum of its proper divisors (32407588736).

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

20826511552 is a wasteful number, since it uses less digits than its factorization.

20826511552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9115 (or 9098 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 20826511552 in words is "twenty billion, eight hundred twenty-six million, five hundred eleven thousand, five hundred fifty-two".