20988934 has 8 divisors (see below), whose sum is σ = 31515120. Its totient is φ = 10483896.

The previous prime is 20988923. The next prime is 20988973. The reversal of 20988934 is 43988902.

It is a happy number.

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

It is a congruent number.

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, 2514 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (3939390).

Almost surely, 2^20988934 is an apocalyptic number.

20988934 is a deficient number, since it is larger than the sum of its proper divisors (10526186).

20988934 is a wasteful number, since it uses less digits than its factorization.

20988934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10574.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 20988934 is about 4581.3681362667. The cubic root of 20988934 is about 275.8439484013.

The spelling of 20988934 in words is "twenty million, nine hundred eighty-eight thousand, nine hundred thirty-four".