20233055987 has 16 divisors (see below), whose sum is σ = 21019951104. Its totient is φ = 19459440000.

The previous prime is 20233055981. The next prime is 20233055993. The reversal of 20233055987 is 78955033202.

It is an interprime number because it is at equal distance from previous prime (20233055981) and next prime (20233055993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20233055987 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20233055981) 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, 2466062 + ... + 2474252.

It is an arithmetic number, because the mean of its divisors is an integer number (1313746944).

Almost surely, 2^20233055987 is an apocalyptic number.

20233055987 is a deficient number, since it is larger than the sum of its proper divisors (786895117).

20233055987 is a wasteful number, since it uses less digits than its factorization.

20233055987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8990.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 20233055987 in words is "twenty billion, two hundred thirty-three million, fifty-five thousand, nine hundred eighty-seven".