21458295508 has 12 divisors (see below), whose sum is σ = 40440633940. Its totient is φ = 9903828672.

The previous prime is 21458295497. The next prime is 21458295571. The reversal of 21458295508 is 80559285412.

It can be written as a sum of positive squares in 2 ways, for example, as 1206728644 + 20251566864 = 34738^2 + 142308^2 .

It is a super-2 number, since 2×21458295508² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206329713 + ... + 206329816.

Almost surely, 2^21458295508 is an apocalyptic number.

It is an amenable number.

21458295508 is a deficient number, since it is larger than the sum of its proper divisors (18982338432).

21458295508 is a wasteful number, since it uses less digits than its factorization.

21458295508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412659546 (or 412659544 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 49.

The spelling of 21458295508 in words is "twenty-one billion, four hundred fifty-eight million, two hundred ninety-five thousand, five hundred eight".