100420863940 has 24 divisors (see below), whose sum is σ = 211685664960. Its totient is φ = 40015612128.

The previous prime is 100420863899. The next prime is 100420863953. The reversal of 100420863940 is 49368024001.

It is a self number, because there is not a number n which added to its sum of digits gives 100420863940.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9540450 + ... + 9550969.

It is an arithmetic number, because the mean of its divisors is an integer number (8820236040).

Almost surely, 2^100420863940 is an apocalyptic number.

100420863940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100420863940 is an abundant number, since it is smaller than the sum of its proper divisors (111264801020).

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

100420863940 is a wasteful number, since it uses less digits than its factorization.

100420863940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19091691 (or 19091689 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

Adding to 100420863940 its reverse (49368024001), we get a palindrome (149788887941).

The spelling of 100420863940 in words is "one hundred billion, four hundred twenty million, eight hundred sixty-three thousand, nine hundred forty".