20432554140 has 96 divisors (see below), whose sum is σ = 57976611840. Its totient is φ = 5376042496.

The previous prime is 20432554127. The next prime is 20432554169. The reversal of 20432554140 is 4145523402.

It is a super-2 number, since 2×20432554140² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20432554098 and 20432554107.

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, 2682217 + ... + 2689823.

It is an arithmetic number, because the mean of its divisors is an integer number (603923040).

Almost surely, 2^20432554140 is an apocalyptic number.

20432554140 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 20432554140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28988305920).

20432554140 is an abundant number, since it is smaller than the sum of its proper divisors (37544057700).

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

20432554140 is a wasteful number, since it uses less digits than its factorization.

20432554140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8211 (or 8209 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 20432554140 in words is "twenty billion, four hundred thirty-two million, five hundred fifty-four thousand, one hundred forty".