20250451987 has 2 divisors, whose sum is σ = 20250451988. Its totient is φ = 20250451986.

The previous prime is 20250451979. The next prime is 20250452023. The reversal of 20250451987 is 78915405202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20250451987 - 2³ = 20250451979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20250451957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125225993 + 10125225994.

It is an arithmetic number, because the mean of its divisors is an integer number (10125225994).

Almost surely, 2^20250451987 is an apocalyptic number.

20250451987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20250451987 is an equidigital number, since it uses as much as digits as its factorization.

20250451987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 20250451987 in words is "twenty billion, two hundred fifty million, four hundred fifty-one thousand, nine hundred eighty-seven".