20956046101 has 4 divisors (see below), whose sum is σ = 20970178432. Its totient is φ = 20941913772.

The previous prime is 20956046093. The next prime is 20956046107. The reversal of 20956046101 is 10164065902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20956046101 - 2³ = 20956046093 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 (20956046107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7063941 + ... + 7066906.

It is an arithmetic number, because the mean of its divisors is an integer number (5242544608).

Almost surely, 2^20956046101 is an apocalyptic number.

It is an amenable number.

20956046101 is a deficient number, since it is larger than the sum of its proper divisors (14132331).

20956046101 is a wasteful number, since it uses less digits than its factorization.

20956046101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132330.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 20956046101 in words is "twenty billion, nine hundred fifty-six million, forty-six thousand, one hundred one".