21274345475 has 12 divisors (see below), whose sum is σ = 27023608920. Its totient is φ = 16604366400.

The previous prime is 21274345459. The next prime is 21274345487. The reversal of 21274345475 is 57454347212.

It is not a de Polignac number, because 21274345475 - 2⁴ = 21274345459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10376705 + ... + 10378754.

It is an arithmetic number, because the mean of its divisors is an integer number (2251967410).

Almost surely, 2^21274345475 is an apocalyptic number.

21274345475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21274345475 is a deficient number, since it is larger than the sum of its proper divisors (5749263445).

21274345475 is a wasteful number, since it uses less digits than its factorization.

21274345475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20755510 (or 20755505 counting only the distinct ones).

The product of its digits is 940800, while the sum is 44.

The spelling of 21274345475 in words is "twenty-one billion, two hundred seventy-four million, three hundred forty-five thousand, four hundred seventy-five".