20352503440 has 40 divisors (see below), whose sum is σ = 47336880960. Its totient is φ = 8138023296.

The previous prime is 20352503407. The next prime is 20352503453. The reversal of 20352503440 is 4430525302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20352503399 and 20352503408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180397 + ... + 270643.

It is an arithmetic number, because the mean of its divisors is an integer number (1183422024).

Almost surely, 2^20352503440 is an apocalyptic number.

20352503440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20352503440 is an abundant number, since it is smaller than the sum of its proper divisors (26984377520).

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

20352503440 is a wasteful number, since it uses less digits than its factorization.

20352503440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93079 (or 93073 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

The spelling of 20352503440 in words is "twenty billion, three hundred fifty-two million, five hundred three thousand, four hundred forty".