20702590261 has 8 divisors (see below), whose sum is σ = 20791499904. Its totient is φ = 20613783120.

The previous prime is 20702590243. The next prime is 20702590273. The reversal of 20702590261 is 16209520702.

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

It is a cyclic number.

It is not a de Polignac number, because 20702590261 - 2⁵ = 20702590229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702590201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 393816 + ... + 443278.

It is an arithmetic number, because the mean of its divisors is an integer number (2598937488).

Almost surely, 2^20702590261 is an apocalyptic number.

It is an amenable number.

20702590261 is a deficient number, since it is larger than the sum of its proper divisors (88909643).

20702590261 is a wasteful number, since it uses less digits than its factorization.

20702590261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51251.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 20702590261 in words is "twenty billion, seven hundred two million, five hundred ninety thousand, two hundred sixty-one".