21489757210354 has 32 divisors (see below), whose sum is σ = 32691783720960. Its totient is φ = 10593523894800.

The previous prime is 21489757210343. The next prime is 21489757210367. The reversal of 21489757210354 is 45301275798412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42126639 + ... + 42633709.

It is an arithmetic number, because the mean of its divisors is an integer number (1021618241280).

Almost surely, 2^{21489757210354} is an apocalyptic number.

21489757210354 is a deficient number, since it is larger than the sum of its proper divisors (11202026510606).

21489757210354 is a wasteful number, since it uses less digits than its factorization.

21489757210354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508086.

The product of its (nonzero) digits is 16934400, while the sum is 58.

The spelling of 21489757210354 in words is "twenty-one trillion, four hundred eighty-nine billion, seven hundred fifty-seven million, two hundred ten thousand, three hundred fifty-four".