20400143100 has 36 divisors (see below), whose sum is σ = 59024414904. Its totient is φ = 5440038080.

The previous prime is 20400143087. The next prime is 20400143129. The reversal of 20400143100 is 134100402.

It is a super-2 number, since 2×20400143100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20400143100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33999939 + ... + 34000538.

Almost surely, 2^20400143100 is an apocalyptic number.

20400143100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20400143100 is an abundant number, since it is smaller than the sum of its proper divisors (38624271804).

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

20400143100 is a wasteful number, since it uses less digits than its factorization.

20400143100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68000494 (or 68000487 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20400143100 its reverse (134100402), we get a palindrome (20534243502).

The spelling of 20400143100 in words is "twenty billion, four hundred million, one hundred forty-three thousand, one hundred".