20277247540 has 24 divisors (see below), whose sum is σ = 46453331232. Its totient is φ = 7373544480.

The previous prime is 20277247517. The next prime is 20277247541. The reversal of 20277247540 is 4574277202.

It is a super-2 number, since 2×20277247540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20277247493 and 20277247502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20277247541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46084434 + ... + 46084873.

It is an arithmetic number, because the mean of its divisors is an integer number (1935555468).

Almost surely, 2^20277247540 is an apocalyptic number.

20277247540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20277247540 is an abundant number, since it is smaller than the sum of its proper divisors (26176083692).

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

20277247540 is a wasteful number, since it uses less digits than its factorization.

20277247540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92169327 (or 92169325 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 40.

The spelling of 20277247540 in words is "twenty billion, two hundred seventy-seven million, two hundred forty-seven thousand, five hundred forty".