20292740 has 24 divisors (see below), whose sum is σ = 45893400. Its totient is φ = 7492608.

The previous prime is 20292737. The next prime is 20292763. The reversal of 20292740 is 4729202.

It can be written as a sum of positive squares in 4 ways, for example, as 6724 + 20286016 = 82^2 + 4504^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 38765 + ... + 39284.

It is an arithmetic number, because the mean of its divisors is an integer number (1912225).

Almost surely, 2^20292740 is an apocalyptic number.

20292740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20292740 is an abundant number, since it is smaller than the sum of its proper divisors (25600660).

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

20292740 is a wasteful number, since it uses less digits than its factorization.

20292740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78071 (or 78069 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20292740 is about 4504.7463857580. The cubic root of 20292740 is about 272.7597164770.

The spelling of 20292740 in words is "twenty million, two hundred ninety-two thousand, seven hundred forty".