20356411620 has 24 divisors (see below), whose sum is σ = 56997952704. Its totient is φ = 5428376416.

The previous prime is 20356411601. The next prime is 20356411637. The reversal of 20356411620 is 2611465302.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 169636704 + ... + 169636823.

It is an arithmetic number, because the mean of its divisors is an integer number (2374914696).

Almost surely, 2^20356411620 is an apocalyptic number.

20356411620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20356411620 is an abundant number, since it is smaller than the sum of its proper divisors (36641541084).

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

20356411620 is a wasteful number, since it uses less digits than its factorization.

20356411620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339273539 (or 339273537 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20356411620 its reverse (2611465302), we get a palindrome (22967876922).

The spelling of 20356411620 in words is "twenty billion, three hundred fifty-six million, four hundred eleven thousand, six hundred twenty".