20036951 has 4 divisors (see below), whose sum is σ = 21858504. Its totient is φ = 18215400.

The previous prime is 20036923. The next prime is 20036971. The reversal of 20036951 is 15963002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20036951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20036951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036921) 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, 910760 + ... + 910781.

It is an arithmetic number, because the mean of its divisors is an integer number (5464626).

Almost surely, 2^20036951 is an apocalyptic number.

20036951 is a deficient number, since it is larger than the sum of its proper divisors (1821553).

20036951 is a wasteful number, since it uses less digits than its factorization.

20036951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821552.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20036951 is about 4476.2652959806. The cubic root of 20036951 is about 271.6088262239.

Adding to 20036951 its reverse (15963002), we get a palindrome (35999953).

The spelling of 20036951 in words is "twenty million, thirty-six thousand, nine hundred fifty-one".