20473171540 has 24 divisors (see below), whose sum is σ = 43233855840. Its totient is φ = 8143517088.

The previous prime is 20473171531. The next prime is 20473171549. The reversal of 20473171540 is 4517137402.

It is an interprime number because it is at equal distance from previous prime (20473171531) and next prime (20473171549).

It is a junction number, because it is equal to n+sod(n) for n = 20473171496 and 20473171505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473171549) 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, 2855802 + ... + 2862961.

It is an arithmetic number, because the mean of its divisors is an integer number (1801410660).

Almost surely, 2^20473171540 is an apocalyptic number.

20473171540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20473171540 is an abundant number, since it is smaller than the sum of its proper divisors (22760684300).

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

20473171540 is a wasteful number, since it uses less digits than its factorization.

20473171540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718951 (or 5718949 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 20473171540 in words is "twenty billion, four hundred seventy-three million, one hundred seventy-one thousand, five hundred forty".