20854234737 has 24 divisors (see below), whose sum is σ = 34456974656. Its totient is φ = 11905996896.

The previous prime is 20854234733. The next prime is 20854234759. The reversal of 20854234737 is 73743245802.

20854234737 is a `hidden beast` number, since 2 + 0 + 8 + 542 + 34 + 73 + 7 = 666.

It is not a de Polignac number, because 20854234737 - 2² = 20854234733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20854234692 and 20854234701.

It is not an unprimeable number, because it can be changed into a prime (20854234733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77803 + ... + 218544.

Almost surely, 2^20854234737 is an apocalyptic number.

It is an amenable number.

20854234737 is a deficient number, since it is larger than the sum of its proper divisors (13602739919).

20854234737 is a wasteful number, since it uses less digits than its factorization.

20854234737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297477 (or 297474 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 20854234737 in words is "twenty billion, eight hundred fifty-four million, two hundred thirty-four thousand, seven hundred thirty-seven".