20731466 has 16 divisors (see below), whose sum is σ = 37630656. Its totient is φ = 8362176.

The previous prime is 20731457. The next prime is 20731499. The reversal of 20731466 is 66413702.

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, 43316 + ... + 43791.

It is an arithmetic number, because the mean of its divisors is an integer number (2351916).

Almost surely, 2^20731466 is an apocalyptic number.

20731466 is a deficient number, since it is larger than the sum of its proper divisors (16899190).

20731466 is a wasteful number, since it uses less digits than its factorization.

20731466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87133.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20731466 is about 4553.1819642971. The cubic root of 20731466 is about 274.7113930866.

The spelling of 20731466 in words is "twenty million, seven hundred thirty-one thousand, four hundred sixty-six".