21780522283 has 8 divisors (see below), whose sum is σ = 24212590976. Its totient is φ = 19456545600.

The previous prime is 21780522259. The next prime is 21780522307. The reversal of 21780522283 is 38222508712.

It is an interprime number because it is at equal distance from previous prime (21780522259) and next prime (21780522307).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21780522283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21780522223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27022578 + ... + 27023383.

It is an arithmetic number, because the mean of its divisors is an integer number (3026573872).

Almost surely, 2^21780522283 is an apocalyptic number.

21780522283 is a deficient number, since it is larger than the sum of its proper divisors (2432068693).

21780522283 is a wasteful number, since it uses less digits than its factorization.

21780522283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54046005.

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 21780522283 in words is "twenty-one billion, seven hundred eighty million, five hundred twenty-two thousand, two hundred eighty-three".