21405150412 has 12 divisors (see below), whose sum is σ = 37879901640. Its totient is φ = 10582321376.

The previous prime is 21405150391. The next prime is 21405150427.

21405150412 is nontrivially palindromic in base 10.

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, 30063058 + ... + 30063769.

It is an arithmetic number, because the mean of its divisors is an integer number (3156658470).

Almost surely, 2^21405150412 is an apocalyptic number.

It is an amenable number.

21405150412 is a deficient number, since it is larger than the sum of its proper divisors (16474751228).

21405150412 is a wasteful number, since it uses less digits than its factorization.

21405150412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60126920 (or 60126918 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 21405150412 in words is "twenty-one billion, four hundred five million, one hundred fifty thousand, four hundred twelve".