21653613354 has 16 divisors (see below), whose sum is σ = 45854710848. Its totient is φ = 6793290432.

The previous prime is 21653613307. The next prime is 21653613389. The reversal of 21653613354 is 45331635612.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106145062 + ... + 106145265.

It is an arithmetic number, because the mean of its divisors is an integer number (2865919428).

Almost surely, 2^21653613354 is an apocalyptic number.

21653613354 is an abundant number, since it is smaller than the sum of its proper divisors (24201097494).

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

21653613354 is a wasteful number, since it uses less digits than its factorization.

21653613354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212290349.

The product of its digits is 194400, while the sum is 39.

The spelling of 21653613354 in words is "twenty-one billion, six hundred fifty-three million, six hundred thirteen thousand, three hundred fifty-four".