20862452100 has 144 divisors (see below), whose sum is σ = 71364182400. Its totient is φ = 4604113920.

The previous prime is 20862452069. The next prime is 20862452113. The reversal of 20862452100 is 125426802.

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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110385 + ... + 232184.

It is an arithmetic number, because the mean of its divisors is an integer number (495584600).

Almost surely, 2^20862452100 is an apocalyptic number.

20862452100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20862452100 is an abundant number, since it is smaller than the sum of its proper divisors (50501730300).

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

20862452100 is a wasteful number, since it uses less digits than its factorization.

20862452100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342622 (or 342615 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 20862452100 its reverse (125426802), we get a palindrome (20987878902).

The spelling of 20862452100 in words is "twenty billion, eight hundred sixty-two million, four hundred fifty-two thousand, one hundred".