20702907092 has 54 divisors (see below), whose sum is σ = 43648947342. Its totient is φ = 8566651968.

The previous prime is 20702907077. The next prime is 20702907101. The reversal of 20702907092 is 29070920702.

It can be written as a sum of positive squares in 3 ways, for example, as 3240341776 + 17462565316 = 56924^2 + 132146^2 .

It is a super-2 number, since 2×20702907092² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102038 + ... + 227634.

Almost surely, 2^20702907092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20702907092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21824473671).

20702907092 is an abundant number, since it is smaller than the sum of its proper divisors (22946040250).

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

20702907092 is a wasteful number, since it uses less digits than its factorization.

20702907092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125673 (or 125635 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 20702907092 in words is "twenty billion, seven hundred two million, nine hundred seven thousand, ninety-two".