21654040103420 has 24 divisors (see below), whose sum is σ = 45890672150400. Its totient is φ = 8582151673152.

The previous prime is 21654040103407. The next prime is 21654040103539. The reversal of 21654040103420 is 2430104045612.

It is a congruent number.

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, 4966520780 + ... + 4966525139.

It is an arithmetic number, because the mean of its divisors is an integer number (1912111339600).

Almost surely, 2^{21654040103420} is an apocalyptic number.

21654040103420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21654040103420 is an abundant number, since it is smaller than the sum of its proper divisors (24236632046980).

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

21654040103420 is a wasteful number, since it uses less digits than its factorization.

21654040103420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933046037 (or 9933046035 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 21654040103420 in words is "twenty-one trillion, six hundred fifty-four billion, forty million, one hundred three thousand, four hundred twenty".