20610744540 has 48 divisors (see below), whose sum is σ = 57918471072. Its totient is φ = 5476352256.

The previous prime is 20610744493. The next prime is 20610744601. The reversal of 20610744540 is 4544701602.

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 15 ways as a sum of consecutive naturals, for example, 603439 + ... + 636678.

It is an arithmetic number, because the mean of its divisors is an integer number (1206634814).

Almost surely, 2^20610744540 is an apocalyptic number.

20610744540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20610744540 is an abundant number, since it is smaller than the sum of its proper divisors (37307726532).

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

20610744540 is a wasteful number, since it uses less digits than its factorization.

20610744540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240406 (or 1240404 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The spelling of 20610744540 in words is "twenty billion, six hundred ten million, seven hundred forty-four thousand, five hundred forty".