21134649154 has 8 divisors (see below), whose sum is σ = 31852220688. Its totient is φ = 10517242260.

The previous prime is 21134649139. The next prime is 21134649191. The reversal of 21134649154 is 45194643112.

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

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, 25040632 + ... + 25041475.

It is an arithmetic number, because the mean of its divisors is an integer number (3981527586).

Almost surely, 2^21134649154 is an apocalyptic number.

21134649154 is a deficient number, since it is larger than the sum of its proper divisors (10717571534).

21134649154 is a wasteful number, since it uses less digits than its factorization.

21134649154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50082320.

The product of its digits is 103680, while the sum is 40.

The spelling of 21134649154 in words is "twenty-one billion, one hundred thirty-four million, six hundred forty-nine thousand, one hundred fifty-four".