20311418 has 8 divisors (see below), whose sum is σ = 32070720. Its totient is φ = 9621180.

The previous prime is 20311381. The next prime is 20311433. The reversal of 20311418 is 81411302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20311418.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267218 + ... + 267293.

It is an arithmetic number, because the mean of its divisors is an integer number (4008840).

Almost surely, 2^20311418 is an apocalyptic number.

20311418 is a deficient number, since it is larger than the sum of its proper divisors (11759302).

20311418 is a wasteful number, since it uses less digits than its factorization.

20311418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534532.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 20311418 is about 4506.8190556090. The cubic root of 20311418 is about 272.8433760142.

The spelling of 20311418 in words is "twenty million, three hundred eleven thousand, four hundred eighteen".