20515463016 has 32 divisors (see below), whose sum is σ = 51518664960. Its totient is φ = 6807820032.

The previous prime is 20515462907. The next prime is 20515463039. The reversal of 20515463016 is 61036451502.

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 7 ways as a sum of consecutive naturals, for example, 1911265 + ... + 1921968.

It is an arithmetic number, because the mean of its divisors is an integer number (1609958280).

Almost surely, 2^20515463016 is an apocalyptic number.

It is an amenable number.

20515463016 is an abundant number, since it is smaller than the sum of its proper divisors (31003201944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20515463016 is a wasteful number, since it uses less digits than its factorization.

20515463016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833465 (or 3833461 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 20515463016 in words is "twenty billion, five hundred fifteen million, four hundred sixty-three thousand, sixteen".