20551351152 has 40 divisors (see below), whose sum is σ = 53105422464. Its totient is φ = 6848588224.

The previous prime is 20551351129. The next prime is 20551351189. The reversal of 20551351152 is 25115315502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126253 + ... + 238835.

Almost surely, 2^20551351152 is an apocalyptic number.

It is an amenable number.

20551351152 is an abundant number, since it is smaller than the sum of its proper divisors (32554071312).

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

20551351152 is a wasteful number, since it uses less digits than its factorization.

20551351152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116397 (or 116391 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 20551351152 its reverse (25115315502), we get a palindrome (45666666654).

The spelling of 20551351152 in words is "twenty billion, five hundred fifty-one million, three hundred fifty-one thousand, one hundred fifty-two".