20753307 has 8 divisors (see below), whose sum is σ = 30745680. Its totient is φ = 13835520.

The previous prime is 20753303. The next prime is 20753321. The reversal of 20753307 is 70335702.

It is not a de Polignac number, because 20753307 - 2² = 20753303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 768641 = 20753307 / (2 + 0 + 7 + 5 + 3 + 3 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (20753303) 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, 384294 + ... + 384347.

It is an arithmetic number, because the mean of its divisors is an integer number (3843210).

Almost surely, 2^20753307 is an apocalyptic number.

20753307 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20753307 is a deficient number, since it is larger than the sum of its proper divisors (9992373).

20753307 is an equidigital number, since it uses as much as digits as its factorization.

20753307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768650 (or 768644 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 20753307 is about 4555.5797655183. The cubic root of 20753307 is about 274.8078304818.

The spelling of 20753307 in words is "twenty million, seven hundred fifty-three thousand, three hundred seven".