20797910 has 16 divisors (see below), whose sum is σ = 42784416. Its totient is φ = 7130688.

The previous prime is 20797897. The next prime is 20797921. The reversal of 20797910 is 1979702.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 148487 + ... + 148626.

It is an arithmetic number, because the mean of its divisors is an integer number (2674026).

Almost surely, 2^20797910 is an apocalyptic number.

20797910 is an abundant number, since it is smaller than the sum of its proper divisors (21986506).

20797910 is a wasteful number, since it uses less digits than its factorization.

20797910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297127.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 20797910 is about 4560.4725632329. The cubic root of 20797910 is about 275.0045619078.

The spelling of 20797910 in words is "twenty million, seven hundred ninety-seven thousand, nine hundred ten".