20087020 has 24 divisors (see below), whose sum is σ = 43165584. Its totient is φ = 7847616.

The previous prime is 20086991. The next prime is 20087021. The reversal of 20087020 is 2078002.

It is not an unprimeable number, because it can be changed into a prime (20087021) 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, 10819 + ... + 12538.

It is an arithmetic number, because the mean of its divisors is an integer number (1798566).

Almost surely, 2^20087020 is an apocalyptic number.

20087020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20087020 is an abundant number, since it is smaller than the sum of its proper divisors (23078564).

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

20087020 is a wasteful number, since it uses less digits than its factorization.

20087020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23409 (or 23407 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 20087020 is about 4481.8545268672. The cubic root of 20087020 is about 271.8348731019.

The spelling of 20087020 in words is "twenty million, eighty-seven thousand, twenty".