21485714851215 has 24 divisors (see below), whose sum is σ = 37252335005808. Its totient is φ = 11455838916480.

The previous prime is 21485714851201. The next prime is 21485714851273. The reversal of 21485714851215 is 51215841758412.

21485714851215 is a `hidden beast` number, since 2 + 1 + 4 + 8 + 5 + 71 + 48 + 512 + 15 = 666.

It is not a de Polignac number, because 21485714851215 - 2¹³ = 21485714843023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66691774 + ... + 67013163.

It is an arithmetic number, because the mean of its divisors is an integer number (1552180625242).

Almost surely, 2^{21485714851215} is an apocalyptic number.

21485714851215 is a deficient number, since it is larger than the sum of its proper divisors (15766620154593).

21485714851215 is a wasteful number, since it uses less digits than its factorization.

21485714851215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133708519 (or 133708516 counting only the distinct ones).

The product of its digits is 3584000, while the sum is 54.

The spelling of 21485714851215 in words is "twenty-one trillion, four hundred eighty-five billion, seven hundred fourteen million, eight hundred fifty-one thousand, two hundred fifteen".