21346456355 has 16 divisors (see below), whose sum is σ = 29771331840. Its totient is φ = 14389474272.

The previous prime is 21346456337. The next prime is 21346456463. The reversal of 21346456355 is 55365464312.

It is a cyclic number.

It is not a de Polignac number, because 21346456355 - 2³⁰ = 20272714531 is a prime.

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, 5166569 + ... + 5170698.

It is an arithmetic number, because the mean of its divisors is an integer number (1860708240).

Almost surely, 2^21346456355 is an apocalyptic number.

21346456355 is a deficient number, since it is larger than the sum of its proper divisors (8424875485).

21346456355 is a wasteful number, since it uses less digits than its factorization.

21346456355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10337338.

The product of its digits is 1296000, while the sum is 44.

The spelling of 21346456355 in words is "twenty-one billion, three hundred forty-six million, four hundred fifty-six thousand, three hundred fifty-five".