21603146346771 has 32 divisors (see below), whose sum is σ = 32801071716096. Its totient is φ = 12530120688000.

The previous prime is 21603146346731. The next prime is 21603146346773. The reversal of 21603146346771 is 17764364130612.

It is a happy number.

It is not a de Polignac number, because 21603146346771 - 2¹⁸ = 21603146084627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21603146346773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144950065 + ... + 145099026.

It is an arithmetic number, because the mean of its divisors is an integer number (1025033491128).

Almost surely, 2^{21603146346771} is an apocalyptic number.

21603146346771 is a deficient number, since it is larger than the sum of its proper divisors (11197925369325).

21603146346771 is a wasteful number, since it uses less digits than its factorization.

21603146346771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290049203.

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 21603146346771 in words is "twenty-one trillion, six hundred three billion, one hundred forty-six million, three hundred forty-six thousand, seven hundred seventy-one".