21682400350 has 48 divisors (see below), whose sum is σ = 43482966912. Its totient is φ = 7996325760.

The previous prime is 21682400347. The next prime is 21682400351. The reversal of 21682400350 is 5300428612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682400351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541624 + ... + 580276.

It is an arithmetic number, because the mean of its divisors is an integer number (905895144).

Almost surely, 2^21682400350 is an apocalyptic number.

21682400350 is an abundant number, since it is smaller than the sum of its proper divisors (21800566562).

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

21682400350 is a wasteful number, since it uses less digits than its factorization.

21682400350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39541 (or 39536 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21682400350 its reverse (5300428612), we get a palindrome (26982828962).

The spelling of 21682400350 in words is "twenty-one billion, six hundred eighty-two million, four hundred thousand, three hundred fifty".