20751165100 has 54 divisors (see below), whose sum is σ = 46280254020. Its totient is φ = 8076075840.

The previous prime is 20751165059. The next prime is 20751165103. The reversal of 20751165100 is 156115702.

It is a super-2 number, since 2×20751165100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20751165103) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 61111 + ... + 212689.

Almost surely, 2^20751165100 is an apocalyptic number.

20751165100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20751165100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23140127010).

20751165100 is an abundant number, since it is smaller than the sum of its proper divisors (25529088920).

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

20751165100 is a wasteful number, since it uses less digits than its factorization.

20751165100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151667 (or 151623 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 20751165100 in words is "twenty billion, seven hundred fifty-one million, one hundred sixty-five thousand, one hundred".