21106753698 has 16 divisors (see below), whose sum is σ = 42218959680. Its totient is φ = 7034675856.

The previous prime is 21106753693. The next prime is 21106753721. The reversal of 21106753698 is 89635760112.

It is not an unprimeable number, because it can be changed into a prime (21106753693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175965 + ... + 270512.

It is an arithmetic number, because the mean of its divisors is an integer number (2638684980).

Almost surely, 2^21106753698 is an apocalyptic number.

21106753698 is an abundant number, since it is smaller than the sum of its proper divisors (21112205982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21106753698 is a wasteful number, since it uses less digits than its factorization.

21106753698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454361.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 21106753698 in words is "twenty-one billion, one hundred six million, seven hundred fifty-three thousand, six hundred ninety-eight".