18961475 has 24 divisors (see below), whose sum is σ = 25956672. Its totient is φ = 13651200.

The previous prime is 18961451. The next prime is 18961483. The reversal of 18961475 is 57416981.

It is not a de Polignac number, because 18961475 - 2⁸ = 18961219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12614 + ... + 14036.

It is an arithmetic number, because the mean of its divisors is an integer number (1081528).

Almost surely, 2^18961475 is an apocalyptic number.

18961475 is a deficient number, since it is larger than the sum of its proper divisors (6995197).

18961475 is a wasteful number, since it uses less digits than its factorization.

18961475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1482 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 18961475 is about 4354.4775806060. The cubic root of 18961475 is about 266.6596916578.

The spelling of 18961475 in words is "eighteen million, nine hundred sixty-one thousand, four hundred seventy-five".