20749419177 has 32 divisors (see below), whose sum is σ = 28809578880. Its totient is φ = 13267752960.

The previous prime is 20749419161. The next prime is 20749419217. The reversal of 20749419177 is 77191494702.

It is not a de Polignac number, because 20749419177 - 2⁴ = 20749419161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20749419077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9127513 + ... + 9129785.

It is an arithmetic number, because the mean of its divisors is an integer number (900299340).

Almost surely, 2^20749419177 is an apocalyptic number.

It is an amenable number.

20749419177 is a deficient number, since it is larger than the sum of its proper divisors (8060159703).

20749419177 is a wasteful number, since it uses less digits than its factorization.

20749419177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 20749419177 in words is "twenty billion, seven hundred forty-nine million, four hundred nineteen thousand, one hundred seventy-seven".