21472400070 has 96 divisors (see below), whose sum is σ = 61761533184. Its totient is φ = 5132097600.

The previous prime is 21472400051. The next prime is 21472400071. The reversal of 21472400070 is 7000427412.

It is a happy number.

It is a super-2 number, since 2×21472400070² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472400071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82452 + ... + 223031.

It is an arithmetic number, because the mean of its divisors is an integer number (643349304).

Almost surely, 2^21472400070 is an apocalyptic number.

21472400070 is an abundant number, since it is smaller than the sum of its proper divisors (40289133114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21472400070 is a wasteful number, since it uses less digits than its factorization.

21472400070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305578 (or 305575 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

Adding to 21472400070 its reverse (7000427412), we get a palindrome (28472827482).

The spelling of 21472400070 in words is "twenty-one billion, four hundred seventy-two million, four hundred thousand, seventy".