20011649972 has 24 divisors (see below), whose sum is σ = 35761830720. Its totient is φ = 9795392640.

The previous prime is 20011649963. The next prime is 20011650077. The reversal of 20011649972 is 27994611002.

It is a super-3 number, since 3×20011649972³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 119048 + ... + 232799.

It is an arithmetic number, because the mean of its divisors is an integer number (1490076280).

Almost surely, 2^20011649972 is an apocalyptic number.

It is an amenable number.

20011649972 is a deficient number, since it is larger than the sum of its proper divisors (15750180748).

20011649972 is a wasteful number, since it uses less digits than its factorization.

20011649972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352151 (or 352149 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 20011649972 in words is "twenty billion, eleven million, six hundred forty-nine thousand, nine hundred seventy-two".