20152355623 has 2 divisors, whose sum is σ = 20152355624. Its totient is φ = 20152355622.

The previous prime is 20152355593. The next prime is 20152355633. The reversal of 20152355623 is 32655325102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20152355623 - 2¹³ = 20152347431 is a prime.

It is a super-2 number, since 2×20152355623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20152355633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076177811 + 10076177812.

It is an arithmetic number, because the mean of its divisors is an integer number (10076177812).

Almost surely, 2^20152355623 is an apocalyptic number.

20152355623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152355623 is an equidigital number, since it uses as much as digits as its factorization.

20152355623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 20152355623 in words is "twenty billion, one hundred fifty-two million, three hundred fifty-five thousand, six hundred twenty-three".