20136980 has 24 divisors (see below), whose sum is σ = 43653120. Its totient is φ = 7794720.

The previous prime is 20136973. The next prime is 20136989. The reversal of 20136980 is 8963102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136989) 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, 15620 + ... + 16859.

It is an arithmetic number, because the mean of its divisors is an integer number (1818880).

Almost surely, 2^20136980 is an apocalyptic number.

20136980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20136980 is an abundant number, since it is smaller than the sum of its proper divisors (23516140).

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

20136980 is a wasteful number, since it uses less digits than its factorization.

20136980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32519 (or 32517 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20136980 is about 4487.4246511780. The cubic root of 20136980 is about 272.0600537815.

The spelling of 20136980 in words is "twenty million, one hundred thirty-six thousand, nine hundred eighty".