20022155736 has 64 divisors (see below), whose sum is σ = 55263841920. Its totient is φ = 5994213120.

The previous prime is 20022155731. The next prime is 20022155809. The reversal of 20022155736 is 63755122002.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20022155697 and 20022155706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022155731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434965 + ... + 478788.

It is an arithmetic number, because the mean of its divisors is an integer number (863497530).

Almost surely, 2^20022155736 is an apocalyptic number.

It is an amenable number.

20022155736 is an abundant number, since it is smaller than the sum of its proper divisors (35241686184).

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

20022155736 is a wasteful number, since it uses less digits than its factorization.

20022155736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913856 (or 913852 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

Adding to 20022155736 its reverse (63755122002), we get a palindrome (83777277738).

The spelling of 20022155736 in words is "twenty billion, twenty-two million, one hundred fifty-five thousand, seven hundred thirty-six".