20524749 has 8 divisors (see below), whose sum is σ = 31275840. Its totient is φ = 11728416.

The previous prime is 20524739. The next prime is 20524771. The reversal of 20524749 is 94742502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20524749 - 2¹² = 20520653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524739) 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, 488664 + ... + 488705.

It is an arithmetic number, because the mean of its divisors is an integer number (3909480).

Almost surely, 2^20524749 is an apocalyptic number.

It is an amenable number.

20524749 is a deficient number, since it is larger than the sum of its proper divisors (10751091).

20524749 is an equidigital number, since it uses as much as digits as its factorization.

20524749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977379.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20524749 is about 4530.4248145179. The cubic root of 20524749 is about 273.7952765961.

The spelling of 20524749 in words is "twenty million, five hundred twenty-four thousand, seven hundred forty-nine".