2051636403 has 4 divisors (see below), whose sum is σ = 2735515208. Its totient is φ = 1367757600.

The previous prime is 2051636393. The next prime is 2051636443. The reversal of 2051636403 is 3046361502.

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

It is not a de Polignac number, because 2051636403 - 2⁴ = 2051636387 is a prime.

It is a super-2 number, since 2×2051636403² = 8418423860229556818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051636443) 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, 341939398 + ... + 341939403.

It is an arithmetic number, because the mean of its divisors is an integer number (683878802).

Almost surely, 2^2051636403 is an apocalyptic number.

2051636403 is a deficient number, since it is larger than the sum of its proper divisors (683878805).

2051636403 is an equidigital number, since it uses as much as digits as its factorization.

2051636403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683878804.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 2051636403 is about 45294.9931338995. The cubic root of 2051636403 is about 1270.6720156409.

Adding to 2051636403 its reverse (3046361502), we get a palindrome (5097997905).

The spelling of 2051636403 in words is "two billion, fifty-one million, six hundred thirty-six thousand, four hundred three".