21314015420 has 48 divisors (see below), whose sum is σ = 45343841088. Its totient is φ = 8415014400.

The previous prime is 21314015369. The next prime is 21314015423. The reversal of 21314015420 is 2451041312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314015423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451664 + ... + 496616.

It is an arithmetic number, because the mean of its divisors is an integer number (944663356).

Almost surely, 2^21314015420 is an apocalyptic number.

21314015420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21314015420 is an abundant number, since it is smaller than the sum of its proper divisors (24029825668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21314015420 is a wasteful number, since it uses less digits than its factorization.

21314015420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45270 (or 45268 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21314015420 its reverse (2451041312), we get a palindrome (23765056732).

The spelling of 21314015420 in words is "twenty-one billion, three hundred fourteen million, fifteen thousand, four hundred twenty".