21474041704815 has 32 divisors (see below), whose sum is σ = 39267618564096. Its totient is φ = 9816504917760.

The previous prime is 21474041704747. The next prime is 21474041704823. The reversal of 21474041704815 is 51840714047412.

It is not a de Polignac number, because 21474041704815 - 2⁹ = 21474041704303 is a prime.

It is a super-2 number, since 2×21474041704815² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3162619 + ... + 7276691.

It is an arithmetic number, because the mean of its divisors is an integer number (1227113080128).

Almost surely, 2^{21474041704815} is an apocalyptic number.

21474041704815 is a deficient number, since it is larger than the sum of its proper divisors (17793576859281).

21474041704815 is a wasteful number, since it uses less digits than its factorization.

21474041704815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163799.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 21474041704815 in words is "twenty-one trillion, four hundred seventy-four billion, forty-one million, seven hundred four thousand, eight hundred fifteen".