20753479 has 2 divisors, whose sum is σ = 20753480. Its totient is φ = 20753478.

The previous prime is 20753459. The next prime is 20753519. The reversal of 20753479 is 97435702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20753479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20753419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376739 + 10376740.

It is an arithmetic number, because the mean of its divisors is an integer number (10376740).

Almost surely, 2^20753479 is an apocalyptic number.

20753479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20753479 is an equidigital number, since it uses as much as digits as its factorization.

20753479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 20753479 is about 4555.5986434277. The cubic root of 20753479 is about 274.8085896671.

The spelling of 20753479 in words is "twenty million, seven hundred fifty-three thousand, four hundred seventy-nine".