23157020 has 12 divisors (see below), whose sum is σ = 48629784. Its totient is φ = 9262800.

The previous prime is 23157019. The next prime is 23157059. The reversal of 23157020 is 2075132.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1157851 = 23157020 / (2 + 3 + 1 + 5 + 7 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 23156983 and 23157001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578906 + ... + 578945.

It is an arithmetic number, because the mean of its divisors is an integer number (4052482).

Almost surely, 2^23157020 is an apocalyptic number.

23157020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23157020 is an abundant number, since it is smaller than the sum of its proper divisors (25472764).

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

23157020 is a wasteful number, since it uses less digits than its factorization.

23157020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157860 (or 1157858 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 23157020 is about 4812.1741448123. The cubic root of 23157020 is about 285.0323960301.

The spelling of 23157020 in words is "twenty-three million, one hundred fifty-seven thousand, twenty".