20997034 has 4 divisors (see below), whose sum is σ = 31495554. Its totient is φ = 10498516.

The previous prime is 20997017. The next prime is 20997047. The reversal of 20997034 is 43079902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 9941409 = 3325^2 + 3153^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5249257 + ... + 5249260.

Almost surely, 2^20997034 is an apocalyptic number.

20997034 is a deficient number, since it is larger than the sum of its proper divisors (10498520).

20997034 is a wasteful number, since it uses less digits than its factorization.

20997034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10498519.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20997034 is about 4582.2520663970. The cubic root of 20997034 is about 275.8794281867.

The spelling of 20997034 in words is "twenty million, nine hundred ninety-seven thousand, thirty-four".