20551906713 has 16 divisors (see below), whose sum is σ = 31246338816. Its totient is φ = 11903366400.

The previous prime is 20551906649. The next prime is 20551906741. The reversal of 20551906713 is 31760915502.

It is not a de Polignac number, because 20551906713 - 2⁶ = 20551906649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20551906763) 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 15 ways as a sum of consecutive naturals, for example, 15498513 + ... + 15499838.

It is an arithmetic number, because the mean of its divisors is an integer number (1952896176).

Almost surely, 2^20551906713 is an apocalyptic number.

It is an amenable number.

20551906713 is a deficient number, since it is larger than the sum of its proper divisors (10694432103).

20551906713 is a wasteful number, since it uses less digits than its factorization.

20551906713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30998384.

The product of its (nonzero) digits is 56700, while the sum is 39.

The spelling of 20551906713 in words is "twenty billion, five hundred fifty-one million, nine hundred six thousand, seven hundred thirteen".