18421074 has 32 divisors (see below), whose sum is σ = 46784640. Its totient is φ = 5263056.

The previous prime is 18421057. The next prime is 18421093. The reversal of 18421074 is 47012481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23989 + ... + 24744.

It is an arithmetic number, because the mean of its divisors is an integer number (1462020).

Almost surely, 2^18421074 is an apocalyptic number.

18421074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18421074 is an abundant number, since it is smaller than the sum of its proper divisors (28363566).

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

18421074 is a wasteful number, since it uses less digits than its factorization.

18421074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48751 (or 48745 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18421074 is about 4291.9778657398. The cubic root of 18421074 is about 264.1019750679.

It can be divided in two parts, 1842 and 1074, that added together give a square (2916 = 54²).

The spelling of 18421074 in words is "eighteen million, four hundred twenty-one thousand, seventy-four".