21461190 has 16 divisors (see below), whose sum is σ = 51506928. Its totient is φ = 5722976.

The previous prime is 21461179. The next prime is 21461201. The reversal of 21461190 is 9116412.

It is an interprime number because it is at equal distance from previous prime (21461179) and next prime (21461201).

It is a super-2 number, since 2×21461190² = 921165352432200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21461190.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357657 + ... + 357716.

It is an arithmetic number, because the mean of its divisors is an integer number (3219183).

Almost surely, 2^21461190 is an apocalyptic number.

21461190 is an abundant number, since it is smaller than the sum of its proper divisors (30045738).

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

21461190 is a wasteful number, since it uses less digits than its factorization.

21461190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715383.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21461190 is about 4632.6223675150. The cubic root of 21461190 is about 277.8974743996.

The spelling of 21461190 in words is "twenty-one million, four hundred sixty-one thousand, one hundred ninety".