21772616630 has 32 divisors (see below), whose sum is σ = 40191530400. Its totient is φ = 8487118080.

The previous prime is 21772616573. The next prime is 21772616641. The reversal of 21772616630 is 3661627712.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342596 + ... + 401144.

It is an arithmetic number, because the mean of its divisors is an integer number (1255985325).

Almost surely, 2^21772616630 is an apocalyptic number.

21772616630 is a deficient number, since it is larger than the sum of its proper divisors (18418913770).

21772616630 is a wasteful number, since it uses less digits than its factorization.

21772616630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59504.

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 21772616630 in words is "twenty-one billion, seven hundred seventy-two million, six hundred sixteen thousand, six hundred thirty".