20741437 has 4 divisors (see below), whose sum is σ = 21223840. Its totient is φ = 20259036.

The previous prime is 20741401. The next prime is 20741447. The reversal of 20741437 is 73414702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20741437 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 (20741447) 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, 241137 + ... + 241222.

It is an arithmetic number, because the mean of its divisors is an integer number (5305960).

Almost surely, 2^20741437 is an apocalyptic number.

It is an amenable number.

20741437 is a deficient number, since it is larger than the sum of its proper divisors (482403).

20741437 is an equidigital number, since it uses as much as digits as its factorization.

20741437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482402.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 20741437 is about 4554.2767812244. The cubic root of 20741437 is about 274.7554277323.

The spelling of 20741437 in words is "twenty million, seven hundred forty-one thousand, four hundred thirty-seven".