20744998 has 24 divisors (see below), whose sum is σ = 34813800. Its totient is φ = 9243648.

The previous prime is 20744987. The next prime is 20745007. The reversal of 20744998 is 89944702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10038 + ... + 11926.

It is an arithmetic number, because the mean of its divisors is an integer number (1450575).

Almost surely, 2^20744998 is an apocalyptic number.

20744998 is a deficient number, since it is larger than the sum of its proper divisors (14068802).

20744998 is a wasteful number, since it uses less digits than its factorization.

20744998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 20744998 is about 4554.6677156517. The cubic root of 20744998 is about 274.7711506559.

The spelling of 20744998 in words is "twenty million, seven hundred forty-four thousand, nine hundred ninety-eight".