21772626036 has 48 divisors (see below), whose sum is σ = 61475654016. Its totient is φ = 5854823424.

The previous prime is 21772626013. The next prime is 21772626077. The reversal of 21772626036 is 63062627712.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7622041 + ... + 7624896.

It is an arithmetic number, because the mean of its divisors is an integer number (1280742792).

Almost surely, 2^21772626036 is an apocalyptic number.

It is an amenable number.

21772626036 is an abundant number, since it is smaller than the sum of its proper divisors (39703027980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21772626036 is a wasteful number, since it uses less digits than its factorization.

21772626036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15246968 (or 15246966 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 21772626036 in words is "twenty-one billion, seven hundred seventy-two million, six hundred twenty-six thousand, thirty-six".