20529012 has 24 divisors (see below), whose sum is σ = 54744256. Its totient is φ = 5865408.

The previous prime is 20528999. The next prime is 20529023. The reversal of 20529012 is 21092502.

It is a super-2 number, since 2×20529012² = 842880667392288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20529012.

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, 122113 + ... + 122280.

Almost surely, 2^20529012 is an apocalyptic number.

It is an amenable number.

20529012 is an abundant number, since it is smaller than the sum of its proper divisors (34215244).

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

20529012 is a wasteful number, since it uses less digits than its factorization.

20529012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244407 (or 244405 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20529012 is about 4530.8952757706. The cubic root of 20529012 is about 273.8142310864.

The spelling of 20529012 in words is "twenty million, five hundred twenty-nine thousand, twelve".