20740937 has 4 divisors (see below), whose sum is σ = 23703936. Its totient is φ = 17777940.

The previous prime is 20740931. The next prime is 20740939. The reversal of 20740937 is 73904702.

It is a happy number.

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 not a de Polignac number, because 20740937 - 2⁶ = 20740873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20740931) 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, 1481489 + ... + 1481502.

It is an arithmetic number, because the mean of its divisors is an integer number (5925984).

Almost surely, 2^20740937 is an apocalyptic number.

It is an amenable number.

20740937 is a deficient number, since it is larger than the sum of its proper divisors (2962999).

20740937 is an equidigital number, since it uses as much as digits as its factorization.

20740937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962998.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20740937 is about 4554.2218874359. The cubic root of 20740937 is about 274.7532199326.

The spelling of 20740937 in words is "twenty million, seven hundred forty thousand, nine hundred thirty-seven".