21146862630 has 64 divisors (see below), whose sum is σ = 55746455040. Its totient is φ = 5110085376.

The previous prime is 21146862523. The next prime is 21146862637. The reversal of 21146862630 is 3626864112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21146862637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 793407 + ... + 819626.

It is an arithmetic number, because the mean of its divisors is an integer number (871038360).

Almost surely, 2^21146862630 is an apocalyptic number.

21146862630 is an abundant number, since it is smaller than the sum of its proper divisors (34599592410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21146862630 is a wasteful number, since it uses less digits than its factorization.

21146862630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613085.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 21146862630 in words is "twenty-one billion, one hundred forty-six million, eight hundred sixty-two thousand, six hundred thirty".