20747235 has 16 divisors (see below), whose sum is σ = 33570720. Its totient is φ = 10940160.

The previous prime is 20747231. The next prime is 20747239. The reversal of 20747235 is 53274702.

It is an interprime number because it is at equal distance from previous prime (20747231) and next prime (20747239).

It is not a de Polignac number, because 20747235 - 2² = 20747231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20747231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6436 + ... + 9105.

It is an arithmetic number, because the mean of its divisors is an integer number (2098170).

Almost surely, 2^20747235 is an apocalyptic number.

20747235 is a deficient number, since it is larger than the sum of its proper divisors (12823485).

20747235 is a wasteful number, since it uses less digits than its factorization.

20747235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15638.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20747235 is about 4554.9132812821. The cubic root of 20747235 is about 274.7810267872.

The spelling of 20747235 in words is "twenty million, seven hundred forty-seven thousand, two hundred thirty-five".