20150304432421 has 4 divisors (see below), whose sum is σ = 20155881603052. Its totient is φ = 20144727261792.

The previous prime is 20150304432413. The next prime is 20150304432487. The reversal of 20150304432421 is 12423440305102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 487385496900 + 19662918935521 = 698130^2 + 4434289^2 .

It is a cyclic number.

It is not a de Polignac number, because 20150304432421 - 2³ = 20150304432413 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 (20150304432221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788579896 + ... + 2788587121.

It is an arithmetic number, because the mean of its divisors is an integer number (5038970400763).

Almost surely, 2^{20150304432421} is an apocalyptic number.

It is an amenable number.

20150304432421 is a deficient number, since it is larger than the sum of its proper divisors (5577170631).

20150304432421 is an equidigital number, since it uses as much as digits as its factorization.

20150304432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577170630.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20150304432421 its reverse (12423440305102), we get a palindrome (32573744737523).

The spelling of 20150304432421 in words is "twenty trillion, one hundred fifty billion, three hundred four million, four hundred thirty-two thousand, four hundred twenty-one".