21527033775540 has 48 divisors (see below), whose sum is σ = 63448099552320. Its totient is φ = 5438408532480.

The previous prime is 21527033775523. The next prime is 21527033775551. The reversal of 21527033775540 is 4557733072512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9441680341 + ... + 9441682620.

It is an arithmetic number, because the mean of its divisors is an integer number (1321835407340).

Almost surely, 2^{21527033775540} is an apocalyptic number.

21527033775540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21527033775540 is an abundant number, since it is smaller than the sum of its proper divisors (41921065776780).

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

21527033775540 is a wasteful number, since it uses less digits than its factorization.

21527033775540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18883362992 (or 18883362990 counting only the distinct ones).

The product of its (nonzero) digits is 6174000, while the sum is 51.

The spelling of 21527033775540 in words is "twenty-one trillion, five hundred twenty-seven billion, thirty-three million, seven hundred seventy-five thousand, five hundred forty".