20012351 has 4 divisors (see below), whose sum is σ = 20055672. Its totient is φ = 19969032.

The previous prime is 20012347. The next prime is 20012371. The reversal of 20012351 is 15321002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20012351 - 2² = 20012347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012341) 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, 20960 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (5013918).

Almost surely, 2^20012351 is an apocalyptic number.

20012351 is a deficient number, since it is larger than the sum of its proper divisors (43321).

20012351 is an equidigital number, since it uses as much as digits as its factorization.

20012351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43320.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20012351 is about 4473.5166256537. The cubic root of 20012351 is about 271.4976264479.

Adding to 20012351 its reverse (15321002), we get a palindrome (35333353).

The spelling of 20012351 in words is "twenty million, twelve thousand, three hundred fifty-one".