20529420 has 48 divisors (see below), whose sum is σ = 57684480. Its totient is φ = 5455296.

The previous prime is 20529407. The next prime is 20529427. The reversal of 20529420 is 2492502.

It is not an unprimeable number, because it can be changed into a prime (20529427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27411 + ... + 28149.

It is an arithmetic number, because the mean of its divisors is an integer number (1201760).

Almost surely, 2^20529420 is an apocalyptic number.

20529420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20529420 is an abundant number, since it is smaller than the sum of its proper divisors (37155060).

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

20529420 is a wasteful number, since it uses less digits than its factorization.

20529420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20529420 is about 4530.9402997612. The cubic root of 20529420 is about 273.8160450309.

The spelling of 20529420 in words is "twenty million, five hundred twenty-nine thousand, four hundred twenty".