20702998 has 4 divisors (see below), whose sum is σ = 31054500. Its totient is φ = 10351498.

The previous prime is 20702993. The next prime is 20703031. The reversal of 20702998 is 89920702.

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

It is a super-2 number, since 2×20702998² = 857228252376008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5175748 + ... + 5175751.

It is an arithmetic number, because the mean of its divisors is an integer number (7763625).

Almost surely, 2^20702998 is an apocalyptic number.

20702998 is a deficient number, since it is larger than the sum of its proper divisors (10351502).

20702998 is a wasteful number, since it uses less digits than its factorization.

20702998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351501.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 20702998 is about 4550.0547249456. The cubic root of 20702998 is about 274.5855929091.

The spelling of 20702998 in words is "twenty million, seven hundred two thousand, nine hundred ninety-eight".