20476047751 has 8 divisors (see below), whose sum is σ = 21264957824. Its totient is φ = 19701352440.

The previous prime is 20476047743. The next prime is 20476047797. The reversal of 20476047751 is 15774067402.

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 20476047751 - 2³ = 20476047743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20476047698 and 20476047707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20476077751) 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, 3550755 + ... + 3556516.

It is an arithmetic number, because the mean of its divisors is an integer number (2658119728).

Almost surely, 2^20476047751 is an apocalyptic number.

20476047751 is a deficient number, since it is larger than the sum of its proper divisors (788910073).

20476047751 is an equidigital number, since it uses as much as digits as its factorization.

20476047751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107381.

The product of its (nonzero) digits is 329280, while the sum is 43.

The spelling of 20476047751 in words is "twenty billion, four hundred seventy-six million, forty-seven thousand, seven hundred fifty-one".