18761420 has 12 divisors (see below), whose sum is σ = 39399024. Its totient is φ = 7504560.

The previous prime is 18761389. The next prime is 18761423. The reversal of 18761420 is 2416781.

It is not an unprimeable number, because it can be changed into a prime (18761423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469016 + ... + 469055.

It is an arithmetic number, because the mean of its divisors is an integer number (3283252).

Almost surely, 2^18761420 is an apocalyptic number.

18761420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18761420 is an abundant number, since it is smaller than the sum of its proper divisors (20637604).

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

18761420 is a wasteful number, since it uses less digits than its factorization.

18761420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938080 (or 938078 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 18761420 is about 4331.4454862090. The cubic root of 18761420 is about 265.7185671752.

The spelling of 18761420 in words is "eighteen million, seven hundred sixty-one thousand, four hundred twenty".