20662242464 has 48 divisors (see below), whose sum is σ = 42467338368. Its totient is φ = 9877308672.

The previous prime is 20662242463. The next prime is 20662242499. The reversal of 20662242464 is 46424226602.

It is a super-2 number, since 2×20662242464² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20662242463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965029 + ... + 1975515.

It is an arithmetic number, because the mean of its divisors is an integer number (884736216).

Almost surely, 2^20662242464 is an apocalyptic number.

It is an amenable number.

20662242464 is an abundant number, since it is smaller than the sum of its proper divisors (21805095904).

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

20662242464 is a wasteful number, since it uses less digits than its factorization.

20662242464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197 (or 13189 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20662242464 in words is "twenty billion, six hundred sixty-two million, two hundred forty-two thousand, four hundred sixty-four".