21492153502 has 8 divisors (see below), whose sum is σ = 32241002976. Its totient is φ = 10745152512.

The previous prime is 21492153469. The next prime is 21492153503. The reversal of 21492153502 is 20535129412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21492153503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432678 + ... + 479785.

It is an arithmetic number, because the mean of its divisors is an integer number (4030125372).

Almost surely, 2^21492153502 is an apocalyptic number.

21492153502 is a deficient number, since it is larger than the sum of its proper divisors (10748849474).

21492153502 is a wasteful number, since it uses less digits than its factorization.

21492153502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924242.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 21492153502 in words is "twenty-one billion, four hundred ninety-two million, one hundred fifty-three thousand, five hundred two".