20737143 has 36 divisors (see below), whose sum is σ = 35479080. Its totient is φ = 11634336.

The previous prime is 20737139. The next prime is 20737153. The reversal of 20737143 is 34173702.

It is not a de Polignac number, because 20737143 - 2² = 20737139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20737153) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25621 + ... + 26417.

It is an arithmetic number, because the mean of its divisors is an integer number (985530).

Almost surely, 2^20737143 is an apocalyptic number.

20737143 is a deficient number, since it is larger than the sum of its proper divisors (14741937).

20737143 is a wasteful number, since it uses less digits than its factorization.

20737143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20737143 is about 4553.8053318077. The cubic root of 20737143 is about 274.7364659919.

It can be divided in two parts, 2073 and 7143, that added together give a square (9216 = 96²).

The spelling of 20737143 in words is "twenty million, seven hundred thirty-seven thousand, one hundred forty-three".