20843745492 has 48 divisors (see below), whose sum is σ = 53735294592. Its totient is φ = 6254899200.

The previous prime is 20843745479. The next prime is 20843745499. The reversal of 20843745492 is 29454734802.

It is a super-2 number, since 2×20843745492² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20843745499) 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, 2216509 + ... + 2225892.

It is an arithmetic number, because the mean of its divisors is an integer number (1119485304).

Almost surely, 2^20843745492 is an apocalyptic number.

It is an amenable number.

20843745492 is an abundant number, since it is smaller than the sum of its proper divisors (32891549100).

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

20843745492 is a wasteful number, since it uses less digits than its factorization.

20843745492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442448 (or 4442446 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 20843745492 in words is "twenty billion, eight hundred forty-three million, seven hundred forty-five thousand, four hundred ninety-two".