16020421025 has 48 divisors (see below), whose sum is σ = 23491353600. Its totient is φ = 10605772800.

The previous prime is 16020421013. The next prime is 16020421031. The reversal of 16020421025 is 52012402061.

It is a happy number.

It is not a de Polignac number, because 16020421025 - 2⁴ = 16020421009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2432537 + ... + 2439113.

It is an arithmetic number, because the mean of its divisors is an integer number (489403200).

Almost surely, 2^16020421025 is an apocalyptic number.

It is an amenable number.

16020421025 is a deficient number, since it is larger than the sum of its proper divisors (7470932575).

16020421025 is a wasteful number, since it uses less digits than its factorization.

16020421025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074 (or 7069 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 16020421025 its reverse (52012402061), we get a palindrome (68032823086).

The spelling of 16020421025 in words is "sixteen billion, twenty million, four hundred twenty-one thousand, twenty-five".