20746061221 has 8 divisors (see below), whose sum is σ = 21995069600. Its totient is φ = 19512763920.

The previous prime is 20746061173. The next prime is 20746061239. The reversal of 20746061221 is 12216064702.

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 20746061221 - 2²¹ = 20743964069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746061291) 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, 3925050 + ... + 3930331.

It is an arithmetic number, because the mean of its divisors is an integer number (2749383700).

Almost surely, 2^20746061221 is an apocalyptic number.

It is an amenable number.

20746061221 is a deficient number, since it is larger than the sum of its proper divisors (1249008379).

20746061221 is a wasteful number, since it uses less digits than its factorization.

20746061221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855539.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 20746061221 in words is "twenty billion, seven hundred forty-six million, sixty-one thousand, two hundred twenty-one".