20151553232 has 10 divisors (see below), whose sum is σ = 39043634418. Its totient is φ = 10075776608.

The previous prime is 20151553189. The next prime is 20151553307. The reversal of 20151553232 is 23235515102.

It can be written as a sum of positive squares in only one way, i.e., 13734902416 + 6416650816 = 117196^2 + 80104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20151553195 and 20151553204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629736023 + ... + 629736054.

Almost surely, 2^20151553232 is an apocalyptic number.

It is an amenable number.

20151553232 is a deficient number, since it is larger than the sum of its proper divisors (18892081186).

20151553232 is a wasteful number, since it uses less digits than its factorization.

20151553232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259472085 (or 1259472079 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 20151553232 in words is "twenty billion, one hundred fifty-one million, five hundred fifty-three thousand, two hundred thirty-two".