20640462022 has 4 divisors (see below), whose sum is σ = 30960693036. Its totient is φ = 10320231010.

The previous prime is 20640461977. The next prime is 20640462103. The reversal of 20640462022 is 22026404602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5160115504 + ... + 5160115507.

It is an arithmetic number, because the mean of its divisors is an integer number (7740173259).

Almost surely, 2^20640462022 is an apocalyptic number.

20640462022 is a deficient number, since it is larger than the sum of its proper divisors (10320231014).

20640462022 is a wasteful number, since it uses less digits than its factorization.

20640462022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320231013.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20640462022 its reverse (22026404602), we get a palindrome (42666866624).

The spelling of 20640462022 in words is "twenty billion, six hundred forty million, four hundred sixty-two thousand, twenty-two".