22512020 has 24 divisors (see below), whose sum is σ = 47652864. Its totient is φ = 8932896.

The previous prime is 22512019. The next prime is 22512047. The reversal of 22512020 is 2021522.

It is a junction number, because it is equal to n+sod(n) for n = 22511986 and 22512004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (1985536).

Almost surely, 2^22512020 is an apocalyptic number.

22512020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22512020 is an abundant number, since it is smaller than the sum of its proper divisors (25140844).

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

22512020 is a wasteful number, since it uses less digits than its factorization.

22512020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8999 (or 8997 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 22512020 is about 4744.6833403295. The cubic root of 22512020 is about 282.3610719506.

Adding to 22512020 its reverse (2021522), we get a palindrome (24533542).

The spelling of 22512020 in words is "twenty-two million, five hundred twelve thousand, twenty".