20741537 has 2 divisors, whose sum is σ = 20741538. Its totient is φ = 20741536.

The previous prime is 20741507. The next prime is 20741551. The reversal of 20741537 is 73514702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 2217121 = 4304^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20741537 - 2⁶ = 20741473 is a prime.

It is a super-2 number, since 2×20741537² = 860422714244738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20741507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10370768 + 10370769.

It is an arithmetic number, because the mean of its divisors is an integer number (10370769).

Almost surely, 2^20741537 is an apocalyptic number.

It is an amenable number.

20741537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20741537 is an equidigital number, since it uses as much as digits as its factorization.

20741537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20741537 is about 4554.2877599027. The cubic root of 20741537 is about 274.7558692880.

The spelling of 20741537 in words is "twenty million, seven hundred forty-one thousand, five hundred thirty-seven".