21362451403436 has 192 divisors, whose sum is σ = 46317969718272. Its totient is φ = 8482320000000.

The previous prime is 21362451403427. The next prime is 21362451403453. The reversal of 21362451403436 is 63430415426312.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2034320186 + ... + 2034330686.

It is an arithmetic number, because the mean of its divisors is an integer number (241239425616).

Almost surely, 2^{21362451403436} is an apocalyptic number.

21362451403436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21362451403436 is an abundant number, since it is smaller than the sum of its proper divisors (24955518314836).

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

21362451403436 is a wasteful number, since it uses less digits than its factorization.

21362451403436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12184 (or 12182 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

Adding to 21362451403436 its reverse (63430415426312), we get a palindrome (84792866829748).

The spelling of 21362451403436 in words is "twenty-one trillion, three hundred sixty-two billion, four hundred fifty-one million, four hundred three thousand, four hundred thirty-six".