20245051421 has 16 divisors (see below), whose sum is σ = 24257630208. Its totient is φ = 16519734000.

The previous prime is 20245051403. The next prime is 20245051433. The reversal of 20245051421 is 12415054202.

It is not a de Polignac number, because 20245051421 - 2⁶ = 20245051357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245051121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264005 + ... + 331946.

It is an arithmetic number, because the mean of its divisors is an integer number (1516101888).

Almost surely, 2^20245051421 is an apocalyptic number.

It is an amenable number.

20245051421 is a deficient number, since it is larger than the sum of its proper divisors (4012578787).

20245051421 is a wasteful number, since it uses less digits than its factorization.

20245051421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596192.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 20245051421 in words is "twenty billion, two hundred forty-five million, fifty-one thousand, four hundred twenty-one".