20101664512 has 36 divisors (see below), whose sum is σ = 40191221056. Its totient is φ = 10034196480.

The previous prime is 20101664503. The next prime is 20101664519. The reversal of 20101664512 is 21546610102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101664519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90712 + ... + 220072.

Almost surely, 2^20101664512 is an apocalyptic number.

It is an amenable number.

20101664512 is a deficient number, since it is larger than the sum of its proper divisors (20089556544).

20101664512 is an equidigital number, since it uses as much as digits as its factorization.

20101664512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129984 (or 129970 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 20101664512 in words is "twenty billion, one hundred one million, six hundred sixty-four thousand, five hundred twelve".