21226065454 has 16 divisors (see below), whose sum is σ = 34998708096. Its totient is φ = 9574559800.

The previous prime is 21226065437. The next prime is 21226065461. The reversal of 21226065454 is 45456062212.

It is a happy number.

It is a super-2 number, since 2×21226065454² (a number of 21 digits) contains 22 as substring.

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, 3679642 + ... + 3685405.

It is an arithmetic number, because the mean of its divisors is an integer number (2187419256).

Almost surely, 2^21226065454 is an apocalyptic number.

21226065454 is a deficient number, since it is larger than the sum of its proper divisors (13772642642).

21226065454 is a wasteful number, since it uses less digits than its factorization.

21226065454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365191.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 21226065454 in words is "twenty-one billion, two hundred twenty-six million, sixty-five thousand, four hundred fifty-four".