20203471440 has 160 divisors (see below), whose sum is σ = 69843029760. Its totient is φ = 5367983616.

The previous prime is 20203471427. The next prime is 20203471481. The reversal of 20203471440 is 4417430202.

It is a super-4 number, since 4×20203471440⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581437 + ... + 615203.

It is an arithmetic number, because the mean of its divisors is an integer number (436518936).

Almost surely, 2^20203471440 is an apocalyptic number.

20203471440 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 20203471440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34921514880).

20203471440 is an abundant number, since it is smaller than the sum of its proper divisors (49639558320).

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

20203471440 is a wasteful number, since it uses less digits than its factorization.

20203471440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34066 (or 34054 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The spelling of 20203471440 in words is "twenty billion, two hundred three million, four hundred seventy-one thousand, four hundred forty".