20451346516 has 12 divisors (see below), whose sum is σ = 36242893120. Its totient is φ = 10096234200.

The previous prime is 20451346493. The next prime is 20451346523. The reversal of 20451346516 is 61564315402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32359410 + ... + 32360041.

Almost surely, 2^20451346516 is an apocalyptic number.

It is an amenable number.

20451346516 is a deficient number, since it is larger than the sum of its proper divisors (15791546604).

20451346516 is a wasteful number, since it uses less digits than its factorization.

20451346516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64719534 (or 64719532 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20451346516 in words is "twenty billion, four hundred fifty-one million, three hundred forty-six thousand, five hundred sixteen".