20121634352 has 20 divisors (see below), whose sum is σ = 38989807320. Its totient is φ = 10059748608.

The previous prime is 20121634343. The next prime is 20121634447. The reversal of 20121634352 is 25343612102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101399 + ... + 224777.

It is an arithmetic number, because the mean of its divisors is an integer number (1949490366).

Almost surely, 2^20121634352 is an apocalyptic number.

It is an amenable number.

20121634352 is a deficient number, since it is larger than the sum of its proper divisors (18868172968).

20121634352 is a wasteful number, since it uses less digits than its factorization.

20121634352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133580 (or 133574 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20121634352 in words is "twenty billion, one hundred twenty-one million, six hundred thirty-four thousand, three hundred fifty-two".