21042410401653 has 16 divisors (see below), whose sum is σ = 28212195625536. Its totient is φ = 13950662901120.

The previous prime is 21042410401651. The next prime is 21042410401673. The reversal of 21042410401653 is 35610401424012.

It is a happy number.

It is not a de Polignac number, because 21042410401653 - 2¹ = 21042410401651 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042410401651) 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, 26294376 + ... + 27082817.

It is an arithmetic number, because the mean of its divisors is an integer number (1763262226596).

Almost surely, 2^{21042410401653} is an apocalyptic number.

It is an amenable number.

21042410401653 is a deficient number, since it is larger than the sum of its proper divisors (7169785223883).

21042410401653 is a wasteful number, since it uses less digits than its factorization.

21042410401653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53377924.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 21042410401653 its reverse (35610401424012), we get a palindrome (56652811825665).

The spelling of 21042410401653 in words is "twenty-one trillion, forty-two billion, four hundred ten million, four hundred one thousand, six hundred fifty-three".