18877425 has 48 divisors (see below), whose sum is σ = 36580992. Its totient is φ = 8409600.

The previous prime is 18877423. The next prime is 18877447. The reversal of 18877425 is 52477881.

It is not a de Polignac number, because 18877425 - 2¹ = 18877423 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18877423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21087 + ... + 21963.

It is an arithmetic number, because the mean of its divisors is an integer number (762104).

Almost surely, 2^18877425 is an apocalyptic number.

18877425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18877425 is a deficient number, since it is larger than the sum of its proper divisors (17703567).

18877425 is a wasteful number, since it uses less digits than its factorization.

18877425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 933 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 18877425 is about 4344.8158764210. The cubic root of 18877425 is about 266.2651030688.

The spelling of 18877425 in words is "eighteen million, eight hundred seventy-seven thousand, four hundred twenty-five".