21403302440415 has 16 divisors (see below), whose sum is σ = 39137467319808. Its totient is φ = 9784366829856.

The previous prime is 21403302440383. The next prime is 21403302440417. The reversal of 21403302440415 is 51404420330412.

It is not a de Polignac number, because 21403302440415 - 2⁵ = 21403302440383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403302440417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101920487707 + ... + 101920487916.

It is an arithmetic number, because the mean of its divisors is an integer number (2446091707488).

Almost surely, 2^{21403302440415} is an apocalyptic number.

21403302440415 is a deficient number, since it is larger than the sum of its proper divisors (17734164879393).

21403302440415 is a wasteful number, since it uses less digits than its factorization.

21403302440415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203840975638.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 21403302440415 its reverse (51404420330412), we get a palindrome (72807722770827).

The spelling of 21403302440415 in words is "twenty-one trillion, four hundred three billion, three hundred two million, four hundred forty thousand, four hundred fifteen".