20456603371 has 2 divisors, whose sum is σ = 20456603372. Its totient is φ = 20456603370.

The previous prime is 20456603357. The next prime is 20456603381. The reversal of 20456603371 is 17330665402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20456603371 - 2⁷ = 20456603243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20456603371.

It is not a weakly prime, because it can be changed into another prime (20456603381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228301685 + 10228301686.

It is an arithmetic number, because the mean of its divisors is an integer number (10228301686).

Almost surely, 2^20456603371 is an apocalyptic number.

20456603371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456603371 is an equidigital number, since it uses as much as digits as its factorization.

20456603371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 20456603371 in words is "twenty billion, four hundred fifty-six million, six hundred three thousand, three hundred seventy-one".