20675783751 has 8 divisors (see below), whose sum is σ = 31505956224. Its totient is φ = 11814733560.

The previous prime is 20675783747. The next prime is 20675783759. The reversal of 20675783751 is 15738757602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20675783751 - 2² = 20675783747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20675783694 and 20675783703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675783759) 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, 492280545 + ... + 492280586.

It is an arithmetic number, because the mean of its divisors is an integer number (3938244528).

Almost surely, 2^20675783751 is an apocalyptic number.

20675783751 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20675783751 is a deficient number, since it is larger than the sum of its proper divisors (10830172473).

20675783751 is an equidigital number, since it uses as much as digits as its factorization.

20675783751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984561141.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 20675783751 in words is "twenty billion, six hundred seventy-five million, seven hundred eighty-three thousand, seven hundred fifty-one".