20020363640 has 32 divisors (see below), whose sum is σ = 45259324560. Its totient is φ = 7970188800.

The previous prime is 20020363621. The next prime is 20020363691. The reversal of 20020363640 is 4636302002.

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, 1177601 + ... + 1194480.

Almost surely, 2^20020363640 is an apocalyptic number.

20020363640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020363640 is an abundant number, since it is smaller than the sum of its proper divisors (25238960920).

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

20020363640 is a wasteful number, since it uses less digits than its factorization.

20020363640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372303 (or 2372299 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 20020363640 its reverse (4636302002), we get a palindrome (24656665642).

The spelling of 20020363640 in words is "twenty billion, twenty million, three hundred sixty-three thousand, six hundred forty".