21013131454 has 8 divisors (see below), whose sum is σ = 36022511088. Its totient is φ = 9005627760.

The previous prime is 21013131449. The next prime is 21013131473. The reversal of 21013131454 is 45413131012.

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

It is a super-4 number, since 4×21013131454⁴ (a number of 42 digits) contains 4444 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, 750468967 + ... + 750468994.

It is an arithmetic number, because the mean of its divisors is an integer number (4502813886).

Almost surely, 2^21013131454 is an apocalyptic number.

21013131454 is a deficient number, since it is larger than the sum of its proper divisors (15009379634).

21013131454 is a wasteful number, since it uses less digits than its factorization.

21013131454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500937970.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 21013131454 its reverse (45413131012), we get a palindrome (66426262466).

The spelling of 21013131454 in words is "twenty-one billion, thirteen million, one hundred thirty-one thousand, four hundred fifty-four".