20551308 has 24 divisors (see below), whose sum is σ = 48045312. Its totient is φ = 6837264.

The previous prime is 20551303. The next prime is 20551367. The reversal of 20551308 is 80315502.

It is not an unprimeable number, because it can be changed into a prime (20551303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6441 + ... + 9087.

It is an arithmetic number, because the mean of its divisors is an integer number (2001888).

Almost surely, 2^20551308 is an apocalyptic number.

It is an amenable number.

20551308 is an abundant number, since it is smaller than the sum of its proper divisors (27494004).

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

20551308 is a wasteful number, since it uses less digits than its factorization.

20551308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 20551308 is about 4533.3550489676. The cubic root of 20551308 is about 273.9133226108.

The spelling of 20551308 in words is "twenty million, five hundred fifty-one thousand, three hundred eight".