20422525 has 24 divisors (see below), whose sum is σ = 27754920. Its totient is φ = 14837760.

The previous prime is 20422517. The next prime is 20422579. The reversal of 20422525 is 52522402.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 4149369 + 16273156 = 2037^2 + 4034^2 .

It is not a de Polignac number, because 20422525 - 2³ = 20422517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20422496 and 20422505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11497 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (1156455).

Almost surely, 2^20422525 is an apocalyptic number.

20422525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20422525 is a deficient number, since it is larger than the sum of its proper divisors (7332395).

20422525 is a wasteful number, since it uses less digits than its factorization.

20422525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1708 counting only the distinct ones).

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

The square root of 20422525 is about 4519.1287877200. The cubic root of 20422525 is about 273.3399719123.

Adding to 20422525 its reverse (52522402), we get a palindrome (72944927).

The spelling of 20422525 in words is "twenty million, four hundred twenty-two thousand, five hundred twenty-five".