20753998 has 4 divisors (see below), whose sum is σ = 31131000. Its totient is φ = 10376998.

The previous prime is 20753933. The next prime is 20754001. The reversal of 20753998 is 89935702.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188498 + ... + 5188501.

It is an arithmetic number, because the mean of its divisors is an integer number (7782750).

Almost surely, 2^20753998 is an apocalyptic number.

20753998 is a deficient number, since it is larger than the sum of its proper divisors (10377002).

20753998 is a wasteful number, since it uses less digits than its factorization.

20753998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377001.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 20753998 is about 4555.6556059474. The cubic root of 20753998 is about 274.8108804392.

The spelling of 20753998 in words is "twenty million, seven hundred fifty-three thousand, nine hundred ninety-eight".