21141537485 has 32 divisors (see below), whose sum is σ = 26488775520. Its totient is φ = 16184475648.

The previous prime is 21141537479. The next prime is 21141537493. The reversal of 21141537485 is 58473514112.

It can be written as a sum of positive squares in 16 ways, for example, as 11974049476 + 9167488009 = 109426^2 + 95747^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141537485 - 2¹⁰ = 21141536461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3174419 + ... + 3181071.

It is an arithmetic number, because the mean of its divisors is an integer number (827774235).

Almost surely, 2^21141537485 is an apocalyptic number.

It is an amenable number.

21141537485 is a deficient number, since it is larger than the sum of its proper divisors (5347238035).

21141537485 is a wasteful number, since it uses less digits than its factorization.

21141537485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977.

The product of its digits is 134400, while the sum is 41.

The spelling of 21141537485 in words is "twenty-one billion, one hundred forty-one million, five hundred thirty-seven thousand, four hundred eighty-five".