21040254324 has 36 divisors (see below), whose sum is σ = 53206818756. Its totient is φ = 7010552448.

The previous prime is 21040254317. The next prime is 21040254331. The reversal of 21040254324 is 42345204012.

21040254324 is a `hidden beast` number, since 210 + 402 + 5 + 43 + 2 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21040254317) and next prime (21040254331).

It can be written as a sum of positive squares in 2 ways, for example, as 14206256100 + 6833998224 = 119190^2 + 82668^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29139 + ... + 207194.

Almost surely, 2^21040254324 is an apocalyptic number.

It is an amenable number.

21040254324 is an abundant number, since it is smaller than the sum of its proper divisors (32166564432).

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

21040254324 is a wasteful number, since it uses less digits than its factorization.

21040254324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238816 (or 238811 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 21040254324 its reverse (42345204012), we get a palindrome (63385458336).

The spelling of 21040254324 in words is "twenty-one billion, forty million, two hundred fifty-four thousand, three hundred twenty-four".