21494629431045 has 80 divisors (see below), whose sum is σ = 39063451534272. Its totient is φ = 11306494667520.

The previous prime is 21494629431043. The next prime is 21494629431059. The reversal of 21494629431045 is 54013492649412.

21494629431045 is a `hidden beast` number, since 2 + 1 + 4 + 9 + 4 + 629 + 4 + 3 + 1 + 0 + 4 + 5 = 666.

It is not a de Polignac number, because 21494629431045 - 2¹ = 21494629431043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21494629430982 and 21494629431000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21494629431043) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7405209 + ... + 9890721.

Almost surely, 2^{21494629431045} is an apocalyptic number.

It is an amenable number.

21494629431045 is a deficient number, since it is larger than the sum of its proper divisors (17568822103227).

21494629431045 is a wasteful number, since it uses less digits than its factorization.

21494629431045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485824 (or 2485815 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 21494629431045 in words is "twenty-one trillion, four hundred ninety-four billion, six hundred twenty-nine million, four hundred thirty-one thousand, forty-five".