20422001564540 has 24 divisors (see below), whose sum is σ = 42968518476912. Its totient is φ = 8153121541760.

The previous prime is 20422001564519. The next prime is 20422001564581. The reversal of 20422001564540 is 4546510022402.

It is a self number, because there is not a number n which added to its sum of digits gives 20422001564540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979932074 + ... + 979952913.

It is an arithmetic number, because the mean of its divisors is an integer number (1790354936538).

Almost surely, 2^{20422001564540} is an apocalyptic number.

20422001564540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422001564540 is an abundant number, since it is smaller than the sum of its proper divisors (22546516912372).

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

20422001564540 is a wasteful number, since it uses less digits than its factorization.

20422001564540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959885517 (or 1959885515 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 20422001564540 its reverse (4546510022402), we get a palindrome (24968511586942).

The spelling of 20422001564540 in words is "twenty trillion, four hundred twenty-two billion, one million, five hundred sixty-four thousand, five hundred forty".