21401024352 has 24 divisors (see below), whose sum is σ = 56177689176. Its totient is φ = 7133674752.

The previous prime is 21401024347. The next prime is 21401024377. The reversal of 21401024352 is 25342010412.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111463573 + ... + 111463764.

It is an arithmetic number, because the mean of its divisors is an integer number (2340737049).

Almost surely, 2^21401024352 is an apocalyptic number.

It is an amenable number.

21401024352 is an abundant number, since it is smaller than the sum of its proper divisors (34776664824).

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

21401024352 is a wasteful number, since it uses less digits than its factorization.

21401024352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222927350 (or 222927342 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21401024352 its reverse (25342010412), we get a palindrome (46743034764).

The spelling of 21401024352 in words is "twenty-one billion, four hundred one million, twenty-four thousand, three hundred fifty-two".