21061505516062 has 16 divisors (see below), whose sum is σ = 34819583630832. Its totient is φ = 9474716632320.

The previous prime is 21061505516057. The next prime is 21061505516153. The reversal of 21061505516062 is 26061550516012.

It is a super-2 number, since 2×21061505516062² (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 7 ways as a sum of consecutive naturals, for example, 4934746113 + ... + 4934750380.

It is an arithmetic number, because the mean of its divisors is an integer number (2176223976927).

Almost surely, 2^{21061505516062} is an apocalyptic number.

21061505516062 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21061505516062 is a deficient number, since it is larger than the sum of its proper divisors (13758078114770).

21061505516062 is a wasteful number, since it uses less digits than its factorization.

21061505516062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869496603.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 21061505516062 in words is "twenty-one trillion, sixty-one billion, five hundred five million, five hundred sixteen thousand, sixty-two".