20537892 has 18 divisors (see below), whose sum is σ = 51915318. Its totient is φ = 6845952.

The previous prime is 20537861. The next prime is 20537899. The reversal of 20537892 is 29873502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12278016 + 8259876 = 3504^2 + 2874^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 570497 = 20537892 / (2 + 0 + 5 + 3 + 7 + 8 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (20537899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 285213 + ... + 285284.

Almost surely, 2^20537892 is an apocalyptic number.

It is an amenable number.

20537892 is an abundant number, since it is smaller than the sum of its proper divisors (31377426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20537892 is a wasteful number, since it uses less digits than its factorization.

20537892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570507 (or 570502 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20537892 is about 4531.8751086057. The cubic root of 20537892 is about 273.8537056256.

The spelling of 20537892 in words is "twenty million, five hundred thirty-seven thousand, eight hundred ninety-two".