20761967502 has 72 divisors (see below), whose sum is σ = 47979450792. Its totient is φ = 6487200000.

The previous prime is 20761967461. The next prime is 20761967507. The reversal of 20761967502 is 20576916702.

20761967502 is a `hidden beast` number, since 2 + 0 + 76 + 19 + 67 + 502 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761967507) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1297752 + ... + 1313652.

It is an arithmetic number, because the mean of its divisors is an integer number (666381261).

Almost surely, 2^20761967502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20761967502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23989725396).

20761967502 is an abundant number, since it is smaller than the sum of its proper divisors (27217483290).

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

20761967502 is a wasteful number, since it uses less digits than its factorization.

20761967502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194 (or 16174 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 20761967502 in words is "twenty billion, seven hundred sixty-one million, nine hundred sixty-seven thousand, five hundred two".