20626129947 has 8 divisors (see below), whose sum is σ = 27603743760. Its totient is φ = 13699634720.

The previous prime is 20626129943. The next prime is 20626129949. The reversal of 20626129947 is 74992162602.

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 20626129947 - 2² = 20626129943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20626129896 and 20626129905.

It is not an unprimeable number, because it can be changed into a prime (20626129943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12778704 + ... + 12780317.

It is an arithmetic number, because the mean of its divisors is an integer number (3450467970).

Almost surely, 2^20626129947 is an apocalyptic number.

20626129947 is a deficient number, since it is larger than the sum of its proper divisors (6977613813).

20626129947 is a wasteful number, since it uses less digits than its factorization.

20626129947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25559293.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 20626129947 in words is "twenty billion, six hundred twenty-six million, one hundred twenty-nine thousand, nine hundred forty-seven".