21630037742370 has 96 divisors (see below), whose sum is σ = 56326930994880. Its totient is φ = 5758905997440.

The previous prime is 21630037742323. The next prime is 21630037742377. The reversal of 21630037742370 is 7324773003612.

21630037742370 is a `hidden beast` number, since 2 + 1 + 630 + 0 + 3 + 7 + 7 + 4 + 2 + 3 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (21630037742377) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151074357 + ... + 151217463.

It is an arithmetic number, because the mean of its divisors is an integer number (586738864530).

Almost surely, 2^{21630037742370} is an apocalyptic number.

21630037742370 is an abundant number, since it is smaller than the sum of its proper divisors (34696893252510).

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

21630037742370 is a wasteful number, since it uses less digits than its factorization.

21630037742370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145760 (or 145757 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 45.

The spelling of 21630037742370 in words is "twenty-one trillion, six hundred thirty billion, thirty-seven million, seven hundred forty-two thousand, three hundred seventy".