18971960 has 32 divisors (see below), whose sum is σ = 48785760. Its totient is φ = 6504576.

The previous prime is 18971959. The next prime is 18971993. The reversal of 18971960 is 6917981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33599 + ... + 34158.

It is an arithmetic number, because the mean of its divisors is an integer number (1524555).

Almost surely, 2^18971960 is an apocalyptic number.

18971960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18971960 is an abundant number, since it is smaller than the sum of its proper divisors (29813800).

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

18971960 is a wasteful number, since it uses less digits than its factorization.

18971960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67775 (or 67771 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 18971960 is about 4355.6813473899. The cubic root of 18971960 is about 266.7088336097.

The spelling of 18971960 in words is "eighteen million, nine hundred seventy-one thousand, nine hundred sixty".