23129420 has 24 divisors (see below), whose sum is σ = 48749904. Its totient is φ = 9217856.

The previous prime is 23129417. The next prime is 23129429. The reversal of 23129420 is 2492132.

It is not an unprimeable number, because it can be changed into a prime (23129429) 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, 3887 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (2031246).

Almost surely, 2^23129420 is an apocalyptic number.

23129420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23129420 is an abundant number, since it is smaller than the sum of its proper divisors (25620484).

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

23129420 is a wasteful number, since it uses less digits than its factorization.

23129420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 23129420 is about 4809.3055631765. The cubic root of 23129420 is about 284.9191111368.

The spelling of 23129420 in words is "twenty-three million, one hundred twenty-nine thousand, four hundred twenty".