20052740 has 24 divisors (see below), whose sum is σ = 42201432. Its totient is φ = 8003840.

The previous prime is 20052719. The next prime is 20052751. The reversal of 20052740 is 4725002.

It can be written as a sum of positive squares in 4 ways, for example, as 7150276 + 12902464 = 2674^2 + 3592^2 .

It is a super-2 number, since 2×20052740² = 804224763015200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 12800 + ... + 14280.

It is an arithmetic number, because the mean of its divisors is an integer number (1758393).

Almost surely, 2^20052740 is an apocalyptic number.

20052740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20052740 is an abundant number, since it is smaller than the sum of its proper divisors (22148692).

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

20052740 is a wasteful number, since it uses less digits than its factorization.

20052740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20052740 is about 4478.0285840981. The cubic root of 20052740 is about 271.6801495477.

Adding to 20052740 its reverse (4725002), we get a palindrome (24777742).

The spelling of 20052740 in words is "twenty million, fifty-two thousand, seven hundred forty".