20780252699 has 8 divisors (see below), whose sum is σ = 20957099520. Its totient is φ = 20603612736.

The previous prime is 20780252693. The next prime is 20780252711. The reversal of 20780252699 is 99625208702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20780252699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20780252693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153497 + ... + 255189.

It is an arithmetic number, because the mean of its divisors is an integer number (2619637440).

Almost surely, 2^20780252699 is an apocalyptic number.

20780252699 is a deficient number, since it is larger than the sum of its proper divisors (176846821).

20780252699 is a wasteful number, since it uses less digits than its factorization.

20780252699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103429.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 20780252699 in words is "twenty billion, seven hundred eighty million, two hundred fifty-two thousand, six hundred ninety-nine".