21375137050724 has 12 divisors (see below), whose sum is σ = 39375252462000. Its totient is φ = 10125064918728.

The previous prime is 21375137050717. The next prime is 21375137050753. The reversal of 21375137050724 is 42705073157312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140625901574 + ... + 140625901725.

It is an arithmetic number, because the mean of its divisors is an integer number (3281271038500).

Almost surely, 2^{21375137050724} is an apocalyptic number.

It is an amenable number.

21375137050724 is a deficient number, since it is larger than the sum of its proper divisors (18000115411276).

21375137050724 is a wasteful number, since it uses less digits than its factorization.

21375137050724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281251803322 (or 281251803320 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 47.

The spelling of 21375137050724 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-seven million, fifty thousand, seven hundred twenty-four".