20459189501 has 2 divisors, whose sum is σ = 20459189502. Its totient is φ = 20459189500.

The previous prime is 20459189473. The next prime is 20459189521. The reversal of 20459189501 is 10598195402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20030740900 + 428448601 = 141530^2 + 20699^2 .

It is a cyclic number.

It is not a de Polignac number, because 20459189501 - 2¹⁴ = 20459173117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20459189521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10229594750 + 10229594751.

It is an arithmetic number, because the mean of its divisors is an integer number (10229594751).

Almost surely, 2^20459189501 is an apocalyptic number.

It is an amenable number.

20459189501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20459189501 is an equidigital number, since it uses as much as digits as its factorization.

20459189501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 20459189501 in words is "twenty billion, four hundred fifty-nine million, one hundred eighty-nine thousand, five hundred one".