20451014540 has 24 divisors (see below), whose sum is σ = 46851415632. Its totient is φ = 7436732480.

The previous prime is 20451014537. The next prime is 20451014567. The reversal of 20451014540 is 4541015402.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46479359 + ... + 46479798.

It is an arithmetic number, because the mean of its divisors is an integer number (1952142318).

Almost surely, 2^20451014540 is an apocalyptic number.

20451014540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20451014540 is an abundant number, since it is smaller than the sum of its proper divisors (26400401092).

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

20451014540 is a wasteful number, since it uses less digits than its factorization.

20451014540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92959177 (or 92959175 counting only the distinct ones).

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

Adding to 20451014540 its reverse (4541015402), we get a palindrome (24992029942).

The spelling of 20451014540 in words is "twenty billion, four hundred fifty-one million, fourteen thousand, five hundred forty".