20445763492 has 72 divisors (see below), whose sum is σ = 45207989568. Its totient is φ = 7919609280.

The previous prime is 20445763489. The next prime is 20445763493. The reversal of 20445763492 is 29436754402.

It is not an unprimeable number, because it can be changed into a prime (20445763493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 568683 + ... + 603565.

It is an arithmetic number, because the mean of its divisors is an integer number (627888744).

Almost surely, 2^20445763492 is an apocalyptic number.

20445763492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20445763492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22603994784).

20445763492 is an abundant number, since it is smaller than the sum of its proper divisors (24762226076).

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

20445763492 is a wasteful number, since it uses less digits than its factorization.

20445763492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35089 (or 35076 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 20445763492 in words is "twenty billion, four hundred forty-five million, seven hundred sixty-three thousand, four hundred ninety-two".