20997754035 has 16 divisors (see below), whose sum is σ = 33772308480. Its totient is φ = 11140168160.

The previous prime is 20997754033. The next prime is 20997754049. The reversal of 20997754035 is 53045779902.

It is not a de Polignac number, because 20997754035 - 2¹ = 20997754033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20997754033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3661665 + ... + 3667394.

It is an arithmetic number, because the mean of its divisors is an integer number (2110769280).

Almost surely, 2^20997754035 is an apocalyptic number.

20997754035 is a deficient number, since it is larger than the sum of its proper divisors (12774554445).

20997754035 is a wasteful number, since it uses less digits than its factorization.

20997754035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7329258.

The product of its (nonzero) digits is 2381400, while the sum is 51.

The spelling of 20997754035 in words is "twenty billion, nine hundred ninety-seven million, seven hundred fifty-four thousand, thirty-five".