21301434425560 has 32 divisors (see below), whose sum is σ = 47946541880160. Its totient is φ = 8517317872896.

The previous prime is 21301434425507. The next prime is 21301434425603. The reversal of 21301434425560 is 6552443410312.

It is a super-2 number, since 2×21301434425560² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 101640804 + ... + 101850163.

It is an arithmetic number, because the mean of its divisors is an integer number (1498329433755).

Almost surely, 2^{21301434425560} is an apocalyptic number.

21301434425560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301434425560 is an abundant number, since it is smaller than the sum of its proper divisors (26645107454600).

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

21301434425560 is a wasteful number, since it uses less digits than its factorization.

21301434425560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203493595 (or 203493591 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 21301434425560 its reverse (6552443410312), we get a palindrome (27853877835872).

The spelling of 21301434425560 in words is "twenty-one trillion, three hundred one billion, four hundred thirty-four million, four hundred twenty-five thousand, five hundred sixty".