21701025034 has 16 divisors (see below), whose sum is σ = 35402590440. Its totient is φ = 9916689600.

The previous prime is 21701025029. The next prime is 21701025053. The reversal of 21701025034 is 43052010712.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18965421225 + 2735603809 = 137715^2 + 52303^2 .

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, 4129329 + ... + 4134580.

Almost surely, 2^21701025034 is an apocalyptic number.

21701025034 is a deficient number, since it is larger than the sum of its proper divisors (13701565406).

21701025034 is a wasteful number, since it uses less digits than its factorization.

21701025034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264025.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 21701025034 its reverse (43052010712), we get a palindrome (64753035746).

The spelling of 21701025034 in words is "twenty-one billion, seven hundred one million, twenty-five thousand, thirty-four".