20284991937 has 24 divisors (see below), whose sum is σ = 33509950656. Its totient is φ = 11583249696.

The previous prime is 20284991893. The next prime is 20284991959. The reversal of 20284991937 is 73919948202.

It is not a de Polignac number, because 20284991937 - 2⁷ = 20284991809 is a prime.

It is a super-3 number, since 3×20284991937³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20284991737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22918 + ... + 202719.

It is an arithmetic number, because the mean of its divisors is an integer number (1396247944).

Almost surely, 2^20284991937 is an apocalyptic number.

It is an amenable number.

20284991937 is a deficient number, since it is larger than the sum of its proper divisors (13224958719).

20284991937 is a wasteful number, since it uses less digits than its factorization.

20284991937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227077 (or 227074 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 20284991937 in words is "twenty billion, two hundred eighty-four million, nine hundred ninety-one thousand, nine hundred thirty-seven".