20952737 has 4 divisors (see below), whose sum is σ = 22564500. Its totient is φ = 19340976.

The previous prime is 20952731. The next prime is 20952751. The reversal of 20952737 is 73725902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1274641 + 19678096 = 1129^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 20952737 - 2¹⁰ = 20951713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20952697 and 20952706.

It is not an unprimeable number, because it can be changed into a prime (20952731) 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, 805862 + ... + 805887.

It is an arithmetic number, because the mean of its divisors is an integer number (5641125).

Almost surely, 2^20952737 is an apocalyptic number.

It is an amenable number.

20952737 is a deficient number, since it is larger than the sum of its proper divisors (1611763).

20952737 is a wasteful number, since it uses less digits than its factorization.

20952737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611762.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20952737 is about 4577.4159741059. The cubic root of 20952737 is about 275.6852859254.

The spelling of 20952737 in words is "twenty million, nine hundred fifty-two thousand, seven hundred thirty-seven".