20111021199974 has 32 divisors (see below), whose sum is σ = 31631834689536. Its totient is φ = 9577582248960.

The previous prime is 20111021199947. The next prime is 20111021199977. The reversal of 20111021199974 is 47999112011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111021199977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690099 + ... + 6889025.

It is an arithmetic number, because the mean of its divisors is an integer number (988494834048).

Almost surely, 2^{20111021199974} is an apocalyptic number.

20111021199974 is a deficient number, since it is larger than the sum of its proper divisors (11520813489562).

20111021199974 is a wasteful number, since it uses less digits than its factorization.

20111021199974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200180.

The product of its (nonzero) digits is 81648, while the sum is 47.

The spelling of 20111021199974 in words is "twenty trillion, one hundred eleven billion, twenty-one million, one hundred ninety-nine thousand, nine hundred seventy-four".