21719300454 has 12 divisors (see below), whose sum is σ = 47058484356. Its totient is φ = 7239766812.

The previous prime is 21719300443. The next prime is 21719300489. The reversal of 21719300454 is 45400391712.

21719300454 is a `hidden beast` number, since 2 + 17 + 193 + 0 + 0 + 454 = 666.

It is a super-2 number, since 2×21719300454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 603313884 + ... + 603313919.

It is an arithmetic number, because the mean of its divisors is an integer number (3921540363).

Almost surely, 2^21719300454 is an apocalyptic number.

21719300454 is an abundant number, since it is smaller than the sum of its proper divisors (25339183902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21719300454 is a wasteful number, since it uses less digits than its factorization.

21719300454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206627811 (or 1206627808 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21719300454 in words is "twenty-one billion, seven hundred nineteen million, three hundred thousand, four hundred fifty-four".