20272707840 has 864 divisors, whose sum is σ = 85183193088. Its totient is φ = 4014489600.

The previous prime is 20272707821. The next prime is 20272707881. The reversal of 20272707840 is 4870727202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 74806905 + ... + 74807175.

Almost surely, 2^20272707840 is an apocalyptic number.

20272707840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20272707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42591596544).

20272707840 is an abundant number, since it is smaller than the sum of its proper divisors (64910485248).

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

20272707840 is a wasteful number, since it uses less digits than its factorization.

20272707840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The spelling of 20272707840 in words is "twenty billion, two hundred seventy-two million, seven hundred seven thousand, eight hundred forty".