10505432240 has 40 divisors (see below), whose sum is σ = 24438519168. Its totient is φ = 4199869440.

The previous prime is 10505432227. The next prime is 10505432279. The reversal of 10505432240 is 4223450501.

It is a happy number.

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

It is a super-2 number, since 2×10505432240² (a number of 21 digits) contains 22 as substring.

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, 114785 + ... + 184895.

Almost surely, 2^10505432240 is an apocalyptic number.

10505432240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10505432240 is an abundant number, since it is smaller than the sum of its proper divisors (13933086928).

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

10505432240 is a wasteful number, since it uses less digits than its factorization.

10505432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71997 (or 71991 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 10505432240 its reverse (4223450501), we get a palindrome (14728882741).

The spelling of 10505432240 in words is "ten billion, five hundred five million, four hundred thirty-two thousand, two hundred forty".