21698184074 has 16 divisors (see below), whose sum is σ = 37199178816. Its totient is φ = 9298648800.

The previous prime is 21698184049. The next prime is 21698184103. The reversal of 21698184074 is 47048189612.

It is a super-2 number, since 2×21698184074² (a number of 21 digits) contains 22 as substring.

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, 252854 + ... + 327614.

It is an arithmetic number, because the mean of its divisors is an integer number (2324948676).

Almost surely, 2^21698184074 is an apocalyptic number.

21698184074 is a deficient number, since it is larger than the sum of its proper divisors (15500994742).

21698184074 is a wasteful number, since it uses less digits than its factorization.

21698184074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95501.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 21698184074 in words is "twenty-one billion, six hundred ninety-eight million, one hundred eighty-four thousand, seventy-four".