20958735345 has 32 divisors (see below), whose sum is σ = 35586905472. Its totient is φ = 10496658432.

The previous prime is 20958735337. The next prime is 20958735383. The reversal of 20958735345 is 54353785902.

It is not a de Polignac number, because 20958735345 - 2³ = 20958735337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20199 + ... + 205731.

It is an arithmetic number, because the mean of its divisors is an integer number (1112090796).

Almost surely, 2^20958735345 is an apocalyptic number.

It is an amenable number.

20958735345 is a deficient number, since it is larger than the sum of its proper divisors (14628170127).

20958735345 is a wasteful number, since it uses less digits than its factorization.

20958735345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186001.

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 20958735345 in words is "twenty billion, nine hundred fifty-eight million, seven hundred thirty-five thousand, three hundred forty-five".