20662077500 has 30 divisors (see below), whose sum is σ = 45183836544. Its totient is φ = 8264830000.

The previous prime is 20662077487. The next prime is 20662077517. The reversal of 20662077500 is 577026602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4129916 + ... + 4134915.

Almost surely, 2^20662077500 is an apocalyptic number.

20662077500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662077500 is an abundant number, since it is smaller than the sum of its proper divisors (24521759044).

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

20662077500 is an equidigital number, since it uses as much as digits as its factorization.

20662077500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264855 (or 8264838 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 20662077500 in words is "twenty billion, six hundred sixty-two million, seventy-seven thousand, five hundred".