21541423030 has 16 divisors (see below), whose sum is σ = 40460412384. Its totient is φ = 8241935680.

The previous prime is 21541423009. The next prime is 21541423067. The reversal of 21541423030 is 3032414512.

It is a junction number, because it is equal to n+sod(n) for n = 21541422986 and 21541423004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46828951 + ... + 46829410.

It is an arithmetic number, because the mean of its divisors is an integer number (2528775774).

Almost surely, 2^21541423030 is an apocalyptic number.

21541423030 is a deficient number, since it is larger than the sum of its proper divisors (18918989354).

21541423030 is a wasteful number, since it uses less digits than its factorization.

21541423030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93658391.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21541423030 its reverse (3032414512), we get a palindrome (24573837542).

The spelling of 21541423030 in words is "twenty-one billion, five hundred forty-one million, four hundred twenty-three thousand, thirty".