20014139987 has 2 divisors, whose sum is σ = 20014139988. Its totient is φ = 20014139986.

The previous prime is 20014139983. The next prime is 20014140059. The reversal of 20014139987 is 78993141002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20014139987 - 2² = 20014139983 is a prime.

It is not a weakly prime, because it can be changed into another prime (20014139983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007069993 + 10007069994.

It is an arithmetic number, because the mean of its divisors is an integer number (10007069994).

Almost surely, 2^20014139987 is an apocalyptic number.

20014139987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20014139987 is an equidigital number, since it uses as much as digits as its factorization.

20014139987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 20014139987 in words is "twenty billion, fourteen million, one hundred thirty-nine thousand, nine hundred eighty-seven".