20622404420 has 24 divisors (see below), whose sum is σ = 43309959000. Its totient is φ = 8248407552.

The previous prime is 20622404419. The next prime is 20622404437. The reversal of 20622404420 is 2440422602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 689482564 + 19932921856 = 26258^2 + 141184^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20622404420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409166 + ... + 456794.

It is an arithmetic number, because the mean of its divisors is an integer number (1804581625).

Almost surely, 2^20622404420 is an apocalyptic number.

20622404420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20622404420 is an abundant number, since it is smaller than the sum of its proper divisors (22687554580).

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

20622404420 is a wasteful number, since it uses less digits than its factorization.

20622404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69287 (or 69285 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The spelling of 20622404420 in words is "twenty billion, six hundred twenty-two million, four hundred four thousand, four hundred twenty".