21434041100 has 18 divisors (see below), whose sum is σ = 46511869404. Its totient is φ = 8573616400.

The previous prime is 21434041093. The next prime is 21434041117. The reversal of 21434041100 is 114043412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107170106 + ... + 107170305.

Almost surely, 2^21434041100 is an apocalyptic number.

21434041100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434041100 is an abundant number, since it is smaller than the sum of its proper divisors (25077828304).

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

21434041100 is a wasteful number, since it uses less digits than its factorization.

21434041100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214340425 (or 214340418 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21434041100 its reverse (114043412), we get a palindrome (21548084512).

The spelling of 21434041100 in words is "twenty-one billion, four hundred thirty-four million, forty-one thousand, one hundred".