20387415623 has 2 divisors, whose sum is σ = 20387415624. Its totient is φ = 20387415622.

The previous prime is 20387415617. The next prime is 20387415673. The reversal of 20387415623 is 32651478302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20387415623 - 2²⁰ = 20386367047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20387415673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193707811 + 10193707812.

It is an arithmetic number, because the mean of its divisors is an integer number (10193707812).

Almost surely, 2^20387415623 is an apocalyptic number.

20387415623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387415623 is an equidigital number, since it uses as much as digits as its factorization.

20387415623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 20387415623 in words is "twenty billion, three hundred eighty-seven million, four hundred fifteen thousand, six hundred twenty-three".