20679550 has 24 divisors (see below), whose sum is σ = 39044376. Its totient is φ = 8147040.

The previous prime is 20679541. The next prime is 20679551. The reversal of 20679550 is 5597602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679551) 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, 264 + ... + 6436.

It is an arithmetic number, because the mean of its divisors is an integer number (1626849).

Almost surely, 2^20679550 is an apocalyptic number.

20679550 is a deficient number, since it is larger than the sum of its proper divisors (18364826).

20679550 is a wasteful number, since it uses less digits than its factorization.

20679550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6247 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 20679550 is about 4547.4773226482. The cubic root of 20679550 is about 274.4818894868.

The spelling of 20679550 in words is "twenty million, six hundred seventy-nine thousand, five hundred fifty".