20001336830 has 32 divisors (see below), whose sum is σ = 37258431840. Its totient is φ = 7721633920.

The previous prime is 20001336829. The next prime is 20001336857. The reversal of 20001336830 is 3863310002.

It is a super-2 number, since 2×20001336830² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001336830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817637 + ... + 841743.

It is an arithmetic number, because the mean of its divisors is an integer number (1164325995).

Almost surely, 2^20001336830 is an apocalyptic number.

20001336830 is a deficient number, since it is larger than the sum of its proper divisors (17257095010).

20001336830 is a wasteful number, since it uses less digits than its factorization.

20001336830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27004.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 20001336830 its reverse (3863310002), we get a palindrome (23864646832).

The spelling of 20001336830 in words is "twenty billion, one million, three hundred thirty-six thousand, eight hundred thirty".