20203051 has 4 divisors (see below), whose sum is σ = 22039704. Its totient is φ = 18366400.

The previous prime is 20203049. The next prime is 20203069. The reversal of 20203051 is 15030202.

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 20203051 - 2¹ = 20203049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918310 + ... + 918331.

It is an arithmetic number, because the mean of its divisors is an integer number (5509926).

Almost surely, 2^20203051 is an apocalyptic number.

20203051 is a deficient number, since it is larger than the sum of its proper divisors (1836653).

20203051 is a wasteful number, since it uses less digits than its factorization.

20203051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836652.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20203051 is about 4494.7804173285. The cubic root of 20203051 is about 272.3572790215.

Adding to 20203051 its reverse (15030202), we get a palindrome (35233253).

It can be divided in two parts, 202030 and 51, that multiplied together give a triangular number (10303530 = T₄₅₃₉).

The spelling of 20203051 in words is "twenty million, two hundred three thousand, fifty-one".