21040001154 has 16 divisors (see below), whose sum is σ = 46755558240. Its totient is φ = 7013333700.

The previous prime is 21040001141. The next prime is 21040001161. The reversal of 21040001154 is 45110004012.

21040001154 is a `hidden beast` number, since 210 + 400 + 0 + 1 + 1 + 54 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194814772 + ... + 194814879.

It is an arithmetic number, because the mean of its divisors is an integer number (2922222390).

Almost surely, 2^21040001154 is an apocalyptic number.

21040001154 is an abundant number, since it is smaller than the sum of its proper divisors (25715557086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21040001154 is a wasteful number, since it uses less digits than its factorization.

21040001154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389629662 (or 389629656 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 21040001154 its reverse (45110004012), we get a palindrome (66150005166).

The spelling of 21040001154 in words is "twenty-one billion, forty million, one thousand, one hundred fifty-four".