21492239046 has 32 divisors (see below), whose sum is σ = 43425439200. Its totient is φ = 7090636800.

The previous prime is 21492239033. The next prime is 21492239057. The reversal of 21492239046 is 64093229412.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21492238989 and 21492239007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2595000 + ... + 2603268.

It is an arithmetic number, because the mean of its divisors is an integer number (1357044975).

Almost surely, 2^21492239046 is an apocalyptic number.

21492239046 is an abundant number, since it is smaller than the sum of its proper divisors (21933200154).

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

21492239046 is a wasteful number, since it uses less digits than its factorization.

21492239046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 21492239046 in words is "twenty-one billion, four hundred ninety-two million, two hundred thirty-nine thousand, forty-six".