21025652012 has 12 divisors (see below), whose sum is σ = 36804143040. Its totient is φ = 10510182576.

The previous prime is 21025651987. The next prime is 21025652017.

21025652012 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21025652017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642908 + ... + 674819.

It is an arithmetic number, because the mean of its divisors is an integer number (3067011920).

Almost surely, 2^21025652012 is an apocalyptic number.

It is an amenable number.

21025652012 is a deficient number, since it is larger than the sum of its proper divisors (15778491028).

21025652012 is a wasteful number, since it uses less digits than its factorization.

21025652012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321720 (or 1321718 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 21025652012 in words is "twenty-one billion, twenty-five million, six hundred fifty-two thousand, twelve".