20797406 has 16 divisors (see below), whose sum is σ = 36412416. Its totient is φ = 8723256.

The previous prime is 20797363. The next prime is 20797411. The reversal of 20797406 is 60479702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15146 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (2275776).

Almost surely, 2^20797406 is an apocalyptic number.

20797406 is a deficient number, since it is larger than the sum of its proper divisors (15615010).

20797406 is a wasteful number, since it uses less digits than its factorization.

20797406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31663.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20797406 is about 4560.4173054667. The cubic root of 20797406 is about 275.0023404759.

The spelling of 20797406 in words is "twenty million, seven hundred ninety-seven thousand, four hundred six".