21031602778162 has 8 divisors (see below), whose sum is σ = 32919030435456. Its totient is φ = 10058592633012.

The previous prime is 21031602778157. The next prime is 21031602778211. The reversal of 21031602778162 is 26187720613012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 457208756047 = 21031602778162 / (2 + 1 + 0 + 3 + 1 + 6 + 0 + 2 + 7 + 7 + 8 + 1 + 6 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228604377978 + ... + 228604378069.

It is an arithmetic number, because the mean of its divisors is an integer number (4114878804432).

Almost surely, 2^{21031602778162} is an apocalyptic number.

21031602778162 is a deficient number, since it is larger than the sum of its proper divisors (11887427657294).

21031602778162 is a wasteful number, since it uses less digits than its factorization.

21031602778162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457208756072.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 21031602778162 in words is "twenty-one trillion, thirty-one billion, six hundred two million, seven hundred seventy-eight thousand, one hundred sixty-two".