20577130 has 48 divisors (see below), whose sum is σ = 43580160. Its totient is φ = 6851520.

The previous prime is 20577119. The next prime is 20577131. The reversal of 20577130 is 3177502.

It is a junction number, because it is equal to n+sod(n) for n = 20577095 and 20577104.

It is not an unprimeable number, because it can be changed into a prime (20577131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260431 + ... + 260509.

It is an arithmetic number, because the mean of its divisors is an integer number (907920).

Almost surely, 2^20577130 is an apocalyptic number.

20577130 is an abundant number, since it is smaller than the sum of its proper divisors (23003030).

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

20577130 is an equidigital number, since it uses as much as digits as its factorization.

20577130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 20577130 is about 4536.2021559891. The cubic root of 20577130 is about 274.0279954346.

The spelling of 20577130 in words is "twenty million, five hundred seventy-seven thousand, one hundred thirty".