21053472415 has 8 divisors (see below), whose sum is σ = 25294721040. Its totient is φ = 16822408512.

The previous prime is 21053472409. The next prime is 21053472431. The reversal of 21053472415 is 51427435012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21053472415 - 2⁹ = 21053471903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2541630 + ... + 2549899.

It is an arithmetic number, because the mean of its divisors is an integer number (3161840130).

Almost surely, 2^21053472415 is an apocalyptic number.

21053472415 is a deficient number, since it is larger than the sum of its proper divisors (4241248625).

21053472415 is an equidigital number, since it uses as much as digits as its factorization.

21053472415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092361.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 21053472415 in words is "twenty-one billion, fifty-three million, four hundred seventy-two thousand, four hundred fifteen".