21426756580702 has 16 divisors (see below), whose sum is σ = 35062102987632. Its totient is φ = 9739396566720.

The previous prime is 21426756580693. The next prime is 21426756580711. The reversal of 21426756580702 is 20708565762412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21426756580693) and next prime (21426756580711).

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, 4260898 + ... + 7810810.

It is an arithmetic number, because the mean of its divisors is an integer number (2191381436727).

Almost surely, 2^{21426756580702} is an apocalyptic number.

21426756580702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21426756580702 is a deficient number, since it is larger than the sum of its proper divisors (13635346406930).

21426756580702 is a wasteful number, since it uses less digits than its factorization.

21426756580702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824283.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 21426756580702 in words is "twenty-one trillion, four hundred twenty-six billion, seven hundred fifty-six million, five hundred eighty thousand, seven hundred two".