21114203240 has 64 divisors (see below), whose sum is σ = 51186764160. Its totient is φ = 7792139520.

The previous prime is 21114203233. The next prime is 21114203267. The reversal of 21114203240 is 4230241112.

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 15 ways as a sum of consecutive naturals, for example, 1169885 + ... + 1187795.

It is an arithmetic number, because the mean of its divisors is an integer number (799793190).

Almost surely, 2^21114203240 is an apocalyptic number.

21114203240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114203240 is an abundant number, since it is smaller than the sum of its proper divisors (30072560920).

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

21114203240 is a wasteful number, since it uses less digits than its factorization.

21114203240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20202 (or 20198 counting only the distinct ones).

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

Adding to 21114203240 its reverse (4230241112), we get a palindrome (25344444352).

The spelling of 21114203240 in words is "twenty-one billion, one hundred fourteen million, two hundred three thousand, two hundred forty".