20711121952 has 12 divisors (see below), whose sum is σ = 40775021406. Its totient is φ = 10355560960.

The previous prime is 20711121889. The next prime is 20711121971. The reversal of 20711121952 is 25912111702.

It can be written as a sum of positive squares in only one way, i.e., 18258495376 + 2452626576 = 135124^2 + 49524^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323611249 + ... + 323611312.

Almost surely, 2^20711121952 is an apocalyptic number.

It is an amenable number.

20711121952 is a deficient number, since it is larger than the sum of its proper divisors (20063899454).

20711121952 is an equidigital number, since it uses as much as digits as its factorization.

20711121952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647222571 (or 647222563 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 20711121952 in words is "twenty billion, seven hundred eleven million, one hundred twenty-one thousand, nine hundred fifty-two".