21058243415 has 16 divisors (see below), whose sum is σ = 27570356640. Its totient is φ = 15313307520.

The previous prime is 21058243387. The next prime is 21058243433. The reversal of 21058243415 is 51434285012.

It is not a de Polignac number, because 21058243415 - 2¹⁶ = 21058177879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625841 + ... + 658629.

It is an arithmetic number, because the mean of its divisors is an integer number (1723147290).

Almost surely, 2^21058243415 is an apocalyptic number.

21058243415 is a deficient number, since it is larger than the sum of its proper divisors (6512113225).

21058243415 is a wasteful number, since it uses less digits than its factorization.

21058243415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44482.

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 21058243415 in words is "twenty-one billion, fifty-eight million, two hundred forty-three thousand, four hundred fifteen".