20502366040 has 32 divisors (see below), whose sum is σ = 49678811280. Its totient is φ = 7570104192.

The previous prime is 20502366029. The next prime is 20502366067. The reversal of 20502366040 is 4066320502.

It is a happy number.

It is a congruent number.

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, 19713294 + ... + 19714333.

Almost surely, 2^20502366040 is an apocalyptic number.

20502366040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20502366040 is an abundant number, since it is smaller than the sum of its proper divisors (29176445240).

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

20502366040 is a wasteful number, since it uses less digits than its factorization.

20502366040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39427651 (or 39427647 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20502366040 its reverse (4066320502), we get a palindrome (24568686542).

The spelling of 20502366040 in words is "twenty billion, five hundred two million, three hundred sixty-six thousand, forty".