21630835146 has 8 divisors (see below), whose sum is σ = 43261670304. Its totient is φ = 7210278380.

The previous prime is 21630835123. The next prime is 21630835267. The reversal of 21630835146 is 64153803612.

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

21630835146 is an admirable number.

It is a super-2 number, since 2×21630835146² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802569590 + ... + 1802569601.

It is an arithmetic number, because the mean of its divisors is an integer number (5407708788).

Almost surely, 2^21630835146 is an apocalyptic number.

21630835146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21630835146 is a wasteful number, since it uses less digits than its factorization.

21630835146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605139196.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 21630835146 in words is "twenty-one billion, six hundred thirty million, eight hundred thirty-five thousand, one hundred forty-six".