20298940 has 24 divisors (see below), whose sum is σ = 43781472. Its totient is φ = 7899840.

The previous prime is 20298919. The next prime is 20298953. The reversal of 20298940 is 4989202.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20298896 and 20298905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12976 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (1824228).

Almost surely, 2^20298940 is an apocalyptic number.

20298940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20298940 is an abundant number, since it is smaller than the sum of its proper divisors (23482532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20298940 is a wasteful number, since it uses less digits than its factorization.

20298940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27477 (or 27475 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20298940 is about 4505.4344962501. The cubic root of 20298940 is about 272.7874922242.

The spelling of 20298940 in words is "twenty million, two hundred ninety-eight thousand, nine hundred forty".