21415374063 has 12 divisors (see below), whose sum is σ = 31159110528. Its totient is φ = 14172704160.

The previous prime is 21415374023. The next prime is 21415374131. The reversal of 21415374063 is 36047351412.

21415374063 is a `hidden beast` number, since 21 + 4 + 1 + 537 + 40 + 63 = 666.

It is not a de Polignac number, because 21415374063 - 2⁶ = 21415373999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415374023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8683023 + ... + 8685488.

It is an arithmetic number, because the mean of its divisors is an integer number (2596592544).

Almost surely, 2^21415374063 is an apocalyptic number.

21415374063 is a deficient number, since it is larger than the sum of its proper divisors (9743736465).

21415374063 is a wasteful number, since it uses less digits than its factorization.

21415374063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17368654 (or 17368651 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 21415374063 in words is "twenty-one billion, four hundred fifteen million, three hundred seventy-four thousand, sixty-three".