21423528408070 has 16 divisors (see below), whose sum is σ = 38576919505248. Its totient is φ = 8566173947520.

The previous prime is 21423528408053. The next prime is 21423528408133. The reversal of 21423528408070 is 7080482532412.

It is a super-2 number, since 2×21423528408070² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21423528408070.

It is a congruent number.

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, 404649171 + ... + 404702110.

It is an arithmetic number, because the mean of its divisors is an integer number (2411057469078).

Almost surely, 2^{21423528408070} is an apocalyptic number.

21423528408070 is a deficient number, since it is larger than the sum of its proper divisors (17153391097178).

21423528408070 is a wasteful number, since it uses less digits than its factorization.

21423528408070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809353935.

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 21423528408070 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred twenty-eight million, four hundred eight thousand, seventy".