20129526 has 16 divisors (see below), whose sum is σ = 44732400. Its totient is φ = 6709824.

The previous prime is 20129503. The next prime is 20129533. The reversal of 20129526 is 62592102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20129526.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186331 + ... + 186438.

It is an arithmetic number, because the mean of its divisors is an integer number (2795775).

Almost surely, 2^20129526 is an apocalyptic number.

20129526 is an abundant number, since it is smaller than the sum of its proper divisors (24602874).

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

20129526 is a wasteful number, since it uses less digits than its factorization.

20129526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372780 (or 372774 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20129526 is about 4486.5940311109. The cubic root of 20129526 is about 272.0264806255.

The spelling of 20129526 in words is "twenty million, one hundred twenty-nine thousand, five hundred twenty-six".