21607435216140 has 48 divisors (see below), whose sum is σ = 61099836628320. Its totient is φ = 5704933388800.

The previous prime is 21607435216123. The next prime is 21607435216153. The reversal of 21607435216140 is 4161253470612.

It is a junction number, because it is equal to n+sod(n) for n = 21607435216092 and 21607435216101.

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, 1782785625 + ... + 1782797744.

It is an arithmetic number, because the mean of its divisors is an integer number (1272913263090).

Almost surely, 2^{21607435216140} is an apocalyptic number.

21607435216140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21607435216140 is an abundant number, since it is smaller than the sum of its proper divisors (39492401412180).

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

21607435216140 is a wasteful number, since it uses less digits than its factorization.

21607435216140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565583482 (or 3565583480 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

Adding to 21607435216140 its reverse (4161253470612), we get a palindrome (25768688686752).

The spelling of 21607435216140 in words is "twenty-one trillion, six hundred seven billion, four hundred thirty-five million, two hundred sixteen thousand, one hundred forty".