18461970 has 24 divisors (see below), whose sum is σ = 48001356. Its totient is φ = 4923168.

The previous prime is 18461969. The next prime is 18461987. The reversal of 18461970 is 7916481.

It can be written as a sum of positive squares in 2 ways, for example, as 17867529 + 594441 = 4227^2 + 771^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102477 + ... + 102656.

Almost surely, 2^18461970 is an apocalyptic number.

18461970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18461970 is an abundant number, since it is smaller than the sum of its proper divisors (29539386).

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

18461970 is a wasteful number, since it uses less digits than its factorization.

18461970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205146 (or 205143 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18461970 is about 4296.7394614987. The cubic root of 18461970 is about 264.2972718866.

The spelling of 18461970 in words is "eighteen million, four hundred sixty-one thousand, nine hundred seventy".