20740773955 has 12 divisors (see below), whose sum is σ = 27357253056. Its totient is φ = 15084198800.

The previous prime is 20740773947. The next prime is 20740774063. The reversal of 20740773955 is 55937704702.

It is not a de Polignac number, because 20740773955 - 2³ = 20740773947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20740773899 and 20740773908.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17140531 + ... + 17141740.

It is an arithmetic number, because the mean of its divisors is an integer number (2279771088).

Almost surely, 2^20740773955 is an apocalyptic number.

20740773955 is a deficient number, since it is larger than the sum of its proper divisors (6616479101).

20740773955 is a wasteful number, since it uses less digits than its factorization.

20740773955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34282298 (or 34282287 counting only the distinct ones).

The product of its (nonzero) digits is 1852200, while the sum is 49.

The spelling of 20740773955 in words is "twenty billion, seven hundred forty million, seven hundred seventy-three thousand, nine hundred fifty-five".