21054174393 has 32 divisors (see below), whose sum is σ = 32200416000. Its totient is φ = 11986845696.

The previous prime is 21054174389. The next prime is 21054174413. The reversal of 21054174393 is 39347145012.

It is not a de Polignac number, because 21054174393 - 2² = 21054174389 is a prime.

It is a super-3 number, since 3×21054174393³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21054174313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9512755 + ... + 9514967.

It is an arithmetic number, because the mean of its divisors is an integer number (1006263000).

Almost surely, 2^21054174393 is an apocalyptic number.

It is an amenable number.

21054174393 is a deficient number, since it is larger than the sum of its proper divisors (11146241607).

21054174393 is a wasteful number, since it uses less digits than its factorization.

21054174393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 21054174393 in words is "twenty-one billion, fifty-four million, one hundred seventy-four thousand, three hundred ninety-three".