20493143 has 8 divisors (see below), whose sum is σ = 23671440. Its totient is φ = 17534080.

The previous prime is 20493131. The next prime is 20493197. The reversal of 20493143 is 34139402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20493143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493113) 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, 54608 + ... + 54981.

It is an arithmetic number, because the mean of its divisors is an integer number (2958930).

Almost surely, 2^20493143 is an apocalyptic number.

20493143 is a deficient number, since it is larger than the sum of its proper divisors (3178297).

20493143 is a wasteful number, since it uses less digits than its factorization.

20493143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109617.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20493143 is about 4526.9352767629. The cubic root of 20493143 is about 273.6546655516.

The spelling of 20493143 in words is "twenty million, four hundred ninety-three thousand, one hundred forty-three".