20575340 has 24 divisors (see below), whose sum is σ = 45087840. Its totient is φ = 7872128.

The previous prime is 20575337. The next prime is 20575369. The reversal of 20575340 is 4357502.

It is a super-2 number, since 2×20575340² = 846689232231200, which contains 22 as substring.

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, 21905 + ... + 22824.

It is an arithmetic number, because the mean of its divisors is an integer number (1878660).

Almost surely, 2^20575340 is an apocalyptic number.

20575340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20575340 is an abundant number, since it is smaller than the sum of its proper divisors (24512500).

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

20575340 is a wasteful number, since it uses less digits than its factorization.

20575340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44761 (or 44759 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20575340 is about 4536.0048500856. The cubic root of 20575340 is about 274.0200493259.

The spelling of 20575340 in words is "twenty million, five hundred seventy-five thousand, three hundred forty".