21402463454 has 8 divisors (see below), whose sum is σ = 32142800808. Its totient is φ = 10688196520.

The previous prime is 21402463399. The next prime is 21402463501. The reversal of 21402463454 is 45436420412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21402463454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6515552 + ... + 6518835.

It is an arithmetic number, because the mean of its divisors is an integer number (4017850101).

Almost surely, 2^21402463454 is an apocalyptic number.

21402463454 is a deficient number, since it is larger than the sum of its proper divisors (10740337354).

21402463454 is a wasteful number, since it uses less digits than its factorization.

21402463454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13035210.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 21402463454 its reverse (45436420412), we get a palindrome (66838883866).

The spelling of 21402463454 in words is "twenty-one billion, four hundred two million, four hundred sixty-three thousand, four hundred fifty-four".