21054174394 has 16 divisors (see below), whose sum is σ = 34644762720. Its totient is φ = 9516613360.

The previous prime is 21054174389. The next prime is 21054174413. The reversal of 21054174394 is 49347145012.

It is a super-3 number, since 3×21054174394³ (a number of 32 digits) contains 333 as substring.

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, 2669269 + ... + 2677144.

It is an arithmetic number, because the mean of its divisors is an integer number (2165297670).

Almost surely, 2^21054174394 is an apocalyptic number.

21054174394 is a deficient number, since it is larger than the sum of its proper divisors (13590588326).

21054174394 is a wasteful number, since it uses less digits than its factorization.

21054174394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5346605.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 21054174394 in words is "twenty-one billion, fifty-four million, one hundred seventy-four thousand, three hundred ninety-four".