21402051014013 has 16 divisors (see below), whose sum is σ = 29783462977536. Its totient is φ = 13644615544560.

The previous prime is 21402051013943. The next prime is 21402051014023. The reversal of 21402051014013 is 31041015020412.

It is not a de Polignac number, because 21402051014013 - 2¹⁸ = 21402050751869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402051014023) 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, 34567753 + ... + 35181438.

It is an arithmetic number, because the mean of its divisors is an integer number (1861466436096).

Almost surely, 2^{21402051014013} is an apocalyptic number.

21402051014013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21402051014013 is a deficient number, since it is larger than the sum of its proper divisors (8381411963523).

21402051014013 is a wasteful number, since it uses less digits than its factorization.

21402051014013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69753664.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21402051014013 its reverse (31041015020412), we get a palindrome (52443066034425).

The spelling of 21402051014013 in words is "twenty-one trillion, four hundred two billion, fifty-one million, fourteen thousand, thirteen".