20724514 has 8 divisors (see below), whose sum is σ = 31927068. Its totient is φ = 10082160.

The previous prime is 20724511. The next prime is 20724521. The reversal of 20724514 is 41542702.

It can be written as a sum of positive squares in 2 ways, for example, as 18636489 + 2088025 = 4317^2 + 1445^2 .

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

It is a super-3 number, since 3×20724514³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20724511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139957 + ... + 140104.

Almost surely, 2^20724514 is an apocalyptic number.

20724514 is a deficient number, since it is larger than the sum of its proper divisors (11202554).

20724514 is a wasteful number, since it uses less digits than its factorization.

20724514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280100.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20724514 is about 4552.4184781279. The cubic root of 20724514 is about 274.6806828108.

The spelling of 20724514 in words is "twenty million, seven hundred twenty-four thousand, five hundred fourteen".