21253044262562 has 8 divisors (see below), whose sum is σ = 36433790164416. Its totient is φ = 9108447541092.

The previous prime is 21253044262561. The next prime is 21253044262613. The reversal of 21253044262562 is 26526244035212.

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

It is not an unprimeable number, because it can be changed into a prime (21253044262561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759037295078 + ... + 759037295105.

It is an arithmetic number, because the mean of its divisors is an integer number (4554223770552).

Almost surely, 2^{21253044262562} is an apocalyptic number.

21253044262562 is a deficient number, since it is larger than the sum of its proper divisors (15180745901854).

21253044262562 is a wasteful number, since it uses less digits than its factorization.

21253044262562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518074590192.

The product of its (nonzero) digits is 1382400, while the sum is 44.

Adding to 21253044262562 its reverse (26526244035212), we get a palindrome (47779288297774).

The spelling of 21253044262562 in words is "twenty-one trillion, two hundred fifty-three billion, forty-four million, two hundred sixty-two thousand, five hundred sixty-two".