20051308 has 24 divisors (see below), whose sum is σ = 38545920. Its totient is φ = 9084240.

The previous prime is 20051303. The next prime is 20051309. The reversal of 20051308 is 80315002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (20051303) 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, 3988 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (1606080).

Almost surely, 2^20051308 is an apocalyptic number.

It is an amenable number.

20051308 is a deficient number, since it is larger than the sum of its proper divisors (18494612).

20051308 is a wasteful number, since it uses less digits than its factorization.

20051308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11517 (or 11515 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20051308 is about 4477.8686894548. The cubic root of 20051308 is about 271.6736823478.

The spelling of 20051308 in words is "twenty million, fifty-one thousand, three hundred eight".