18961432 has 24 divisors (see below), whose sum is σ = 41358060. Its totient is φ = 8126160.

The previous prime is 18961417. The next prime is 18961441. The reversal of 18961432 is 23416981.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23794 + ... + 24577.

Almost surely, 2^18961432 is an apocalyptic number.

It is an amenable number.

18961432 is an abundant number, since it is smaller than the sum of its proper divisors (22396628).

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

18961432 is a wasteful number, since it uses less digits than its factorization.

18961432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48391 (or 48380 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 18961432 is about 4354.4726431567. The cubic root of 18961432 is about 266.6594900846.

The spelling of 18961432 in words is "eighteen million, nine hundred sixty-one thousand, four hundred thirty-two".