21214036503426 has 32 divisors (see below), whose sum is σ = 45693209842560. Its totient is φ = 6527190288384.

The previous prime is 21214036503421. The next prime is 21214036503427. The reversal of 21214036503426 is 62430563041212.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (21214036503421) 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, 1780446 + ... + 6752633.

It is an arithmetic number, because the mean of its divisors is an integer number (1427912807580).

Almost surely, 2^{21214036503426} is an apocalyptic number.

21214036503426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21214036503426 is an abundant number, since it is smaller than the sum of its proper divisors (24479173339134).

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

21214036503426 is a wasteful number, since it uses less digits than its factorization.

21214036503426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564970.

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 21214036503426 its reverse (62430563041212), we get a palindrome (83644599544638).

The spelling of 21214036503426 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred three thousand, four hundred twenty-six".