20747272 has 32 divisors (see below), whose sum is σ = 47880000. Its totient is φ = 8207424.

The previous prime is 20747263. The next prime is 20747273. The reversal of 20747272 is 27274702.

It is not an unprimeable number, because it can be changed into a prime (20747273) 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, 13522 + ... + 14977.

It is an arithmetic number, because the mean of its divisors is an integer number (1496250).

Almost surely, 2^20747272 is an apocalyptic number.

It is an amenable number.

20747272 is an abundant number, since it is smaller than the sum of its proper divisors (27132728).

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

20747272 is a wasteful number, since it uses less digits than its factorization.

20747272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28525 (or 28521 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 20747272 is about 4554.9173428285. The cubic root of 20747272 is about 274.7811901326.

The spelling of 20747272 in words is "twenty million, seven hundred forty-seven thousand, two hundred seventy-two".