21603145514364 has 48 divisors (see below), whose sum is σ = 56008470470400. Its totient is φ = 7201007949168.

The previous prime is 21603145514339. The next prime is 21603145514383. The reversal of 21603145514364 is 46341554130612.

21603145514364 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 31 + 4 + 551 + 4 + 3 + 64 = 666.

It is a super-2 number, since 2×21603145514364² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 23399929 + ... + 24305615.

It is an arithmetic number, because the mean of its divisors is an integer number (1166843134800).

Almost surely, 2^{21603145514364} is an apocalyptic number.

It is an amenable number.

21603145514364 is an abundant number, since it is smaller than the sum of its proper divisors (34405324956036).

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

21603145514364 is a wasteful number, since it uses less digits than its factorization.

21603145514364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126559 (or 1126551 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

Adding to 21603145514364 its reverse (46341554130612), we get a palindrome (67944699644976).

The spelling of 21603145514364 in words is "twenty-one trillion, six hundred three billion, one hundred forty-five million, five hundred fourteen thousand, three hundred sixty-four".