21506672773050 has 96 divisors (see below), whose sum is σ = 56148531264000. Its totient is φ = 5432800570560.

The previous prime is 21506672773037. The next prime is 21506672773073. The reversal of 21506672773050 is 5037727660512.

It is a junction number, because it is equal to n+sod(n) for n = 21506672772984 and 21506672773002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33675601 + ... + 34308299.

It is an arithmetic number, because the mean of its divisors is an integer number (584880534000).

Almost surely, 2^{21506672773050} is an apocalyptic number.

21506672773050 is an abundant number, since it is smaller than the sum of its proper divisors (34641858490950).

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

21506672773050 is a wasteful number, since it uses less digits than its factorization.

21506672773050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644660 (or 644655 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 51.

The spelling of 21506672773050 in words is "twenty-one trillion, five hundred six billion, six hundred seventy-two million, seven hundred seventy-three thousand, fifty".