20675667261 has 8 divisors (see below), whose sum is σ = 27568364544. Its totient is φ = 13783374080.

The previous prime is 20675667241. The next prime is 20675667269. The reversal of 20675667261 is 16276657602.

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 20675667261 - 2³⁰ = 19601925437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20675667261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675667269) 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, 51076 + ... + 209666.

It is an arithmetic number, because the mean of its divisors is an integer number (3446045568).

Almost surely, 2^20675667261 is an apocalyptic number.

It is an amenable number.

20675667261 is a deficient number, since it is larger than the sum of its proper divisors (6892697283).

20675667261 is a wasteful number, since it uses less digits than its factorization.

20675667261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202051.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 20675667261 in words is "twenty billion, six hundred seventy-five million, six hundred sixty-seven thousand, two hundred sixty-one".