20797018 has 24 divisors (see below), whose sum is σ = 36162144. Its totient is φ = 8894400.

The previous prime is 20797013. The next prime is 20797033. The reversal of 20797018 is 81079702.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (20797013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4723 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (1506756).

Almost surely, 2^20797018 is an apocalyptic number.

20797018 is a deficient number, since it is larger than the sum of its proper divisors (15365126).

20797018 is a wasteful number, since it uses less digits than its factorization.

20797018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318 (or 3301 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 20797018 is about 4560.3747653016. The cubic root of 20797018 is about 275.0006303016. Note that the first 3 decimals are identical.

The spelling of 20797018 in words is "twenty million, seven hundred ninety-seven thousand, eighteen".