20951037 has 18 divisors (see below), whose sum is σ = 30732702. Its totient is φ = 13753584.

The previous prime is 20951027. The next prime is 20951083. The reversal of 20951037 is 73015902.

It can be written as a sum of positive squares in only one way, i.e., 18198756 + 2752281 = 4266^2 + 1659^2 .

It is not a de Polignac number, because 20951037 - 2¹¹ = 20948989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20951037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20951017) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55983 + ... + 56355.

Almost surely, 2^20951037 is an apocalyptic number.

It is an amenable number.

20951037 is a deficient number, since it is larger than the sum of its proper divisors (9781665).

20951037 is an equidigital number, since it uses as much as digits as its factorization.

20951037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20951037 is about 4577.2302760512. The cubic root of 20951037 is about 275.6778298165.

Adding to 20951037 its reverse (73015902), we get a palindrome (93966939).

The spelling of 20951037 in words is "twenty million, nine hundred fifty-one thousand, thirty-seven".