20022351540 has 48 divisors (see below), whose sum is σ = 56069012160. Its totient is φ = 5338681600.

The previous prime is 20022351539. The next prime is 20022351541. The reversal of 20022351540 is 4515322002.

It is an interprime number because it is at equal distance from previous prime (20022351539) and next prime (20022351541).

It is a super-2 number, since 2×20022351540² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20022351540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022351541) 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, 794656 + ... + 819464.

It is an arithmetic number, because the mean of its divisors is an integer number (1168104420).

Almost surely, 2^20022351540 is an apocalyptic number.

20022351540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022351540 is an abundant number, since it is smaller than the sum of its proper divisors (36046660620).

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

20022351540 is a wasteful number, since it uses less digits than its factorization.

20022351540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38272 (or 38270 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20022351540 its reverse (4515322002), we get a palindrome (24537673542).

The spelling of 20022351540 in words is "twenty billion, twenty-two million, three hundred fifty-one thousand, five hundred forty".