21137617230263 has 4 divisors (see below), whose sum is σ = 22381006479120. Its totient is φ = 19894227981408.

The previous prime is 21137617230227. The next prime is 21137617230329. The reversal of 21137617230263 is 36203271673112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21137617230263 - 2²⁰ = 21137616181687 is a prime.

It is a super-2 number, since 2×21137617230263² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21137617230463) 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, 621694624403 + ... + 621694624436.

It is an arithmetic number, because the mean of its divisors is an integer number (5595251619780).

Almost surely, 2^{21137617230263} is an apocalyptic number.

21137617230263 is a deficient number, since it is larger than the sum of its proper divisors (1243389248857).

21137617230263 is a wasteful number, since it uses less digits than its factorization.

21137617230263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243389248856.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 21137617230263 in words is "twenty-one trillion, one hundred thirty-seven billion, six hundred seventeen million, two hundred thirty thousand, two hundred sixty-three".