21496919090 has 16 divisors (see below), whose sum is σ = 38696123520. Its totient is φ = 8598396720.

The previous prime is 21496919071. The next prime is 21496919107. The reversal of 21496919090 is 9091969412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438935 + ... + 485445.

It is an arithmetic number, because the mean of its divisors is an integer number (2418507720).

Almost surely, 2^21496919090 is an apocalyptic number.

21496919090 is a deficient number, since it is larger than the sum of its proper divisors (17199204430).

21496919090 is a wasteful number, since it uses less digits than its factorization.

21496919090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92737.

The product of its (nonzero) digits is 314928, while the sum is 50.

The spelling of 21496919090 in words is "twenty-one billion, four hundred ninety-six million, nine hundred nineteen thousand, ninety".