20340572 has 24 divisors (see below), whose sum is σ = 41351520. Its totient is φ = 8573760.

The previous prime is 20340569. The next prime is 20340587. The reversal of 20340572 is 27504302.

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, 4247 + ... + 7662.

It is an arithmetic number, because the mean of its divisors is an integer number (1722980).

Almost surely, 2^20340572 is an apocalyptic number.

It is an amenable number.

20340572 is an abundant number, since it is smaller than the sum of its proper divisors (21010948).

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

20340572 is a wasteful number, since it uses less digits than its factorization.

20340572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11981 (or 11979 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20340572 is about 4510.0523278561. The cubic root of 20340572 is about 272.9738555471.

Adding to 20340572 its reverse (27504302), we get a palindrome (47844874).

The spelling of 20340572 in words is "twenty million, three hundred forty thousand, five hundred seventy-two".