21570426670 has 32 divisors (see below), whose sum is σ = 41945426208. Its totient is φ = 7939325568.

The previous prime is 21570426653. The next prime is 21570426679. The reversal of 21570426670 is 7662407512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21570426679) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 220504 + ... + 302923.

It is an arithmetic number, because the mean of its divisors is an integer number (1310794569).

Almost surely, 2^21570426670 is an apocalyptic number.

21570426670 is a deficient number, since it is larger than the sum of its proper divisors (20374999538).

21570426670 is a wasteful number, since it uses less digits than its factorization.

21570426670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523764.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21570426670 in words is "twenty-one billion, five hundred seventy million, four hundred twenty-six thousand, six hundred seventy".