20542522 has 64 divisors (see below), whose sum is σ = 42835968. Its totient is φ = 7128000.

The previous prime is 20542513. The next prime is 20542531. The reversal of 20542522 is 22524502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20542513) and next prime (20542531).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20542493 and 20542502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61897 + ... + 62227.

It is an arithmetic number, because the mean of its divisors is an integer number (669312).

Almost surely, 2^20542522 is an apocalyptic number.

20542522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20542522 is an abundant number, since it is smaller than the sum of its proper divisors (22293446).

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

20542522 is a wasteful number, since it uses less digits than its factorization.

20542522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20542522 is about 4532.3859058999. The cubic root of 20542522 is about 273.8742829953.

The spelling of 20542522 in words is "twenty million, five hundred forty-two thousand, five hundred twenty-two".