21232772737 has 8 divisors (see below), whose sum is σ = 23442098400. Its totient is φ = 19069959360.

The previous prime is 21232772731. The next prime is 21232772741. The reversal of 21232772737 is 73727723212.

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

It is a cyclic number.

It is not a de Polignac number, because 21232772737 - 2⁷ = 21232772609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232772693 and 21232772702.

It is not an unprimeable number, because it can be changed into a prime (21232772731) 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, 11627112 + ... + 11628937.

It is an arithmetic number, because the mean of its divisors is an integer number (2930262300).

Almost surely, 2^21232772737 is an apocalyptic number.

It is an amenable number.

21232772737 is a deficient number, since it is larger than the sum of its proper divisors (2209325663).

21232772737 is a wasteful number, since it uses less digits than its factorization.

21232772737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23256143.

The product of its digits is 345744, while the sum is 43.

The spelling of 21232772737 in words is "twenty-one billion, two hundred thirty-two million, seven hundred seventy-two thousand, seven hundred thirty-seven".