20500167021890 has 16 divisors (see below), whose sum is σ = 36954327446208. Its totient is φ = 8188060851696.

The previous prime is 20500167021889. The next prime is 20500167021899. The reversal of 20500167021890 is 9812076100502.

It is not an unprimeable number, because it can be changed into a prime (20500167021899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500737462 + ... + 1500751121.

It is an arithmetic number, because the mean of its divisors is an integer number (2309645465388).

Almost surely, 2^{20500167021890} is an apocalyptic number.

20500167021890 is a deficient number, since it is larger than the sum of its proper divisors (16454160424318).

20500167021890 is a wasteful number, since it uses less digits than its factorization.

20500167021890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001489273.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 20500167021890 in words is "twenty trillion, five hundred billion, one hundred sixty-seven million, twenty-one thousand, eight hundred ninety".