220421064634 has 8 divisors (see below), whose sum is σ = 330682087008. Its totient is φ = 110193702300.

The previous prime is 220421064631. The next prime is 220421064637. The reversal of 220421064634 is 436460124022.

It is an interprime number because it is at equal distance from previous prime (220421064631) and next prime (220421064637).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220421064634.

It is not an unprimeable number, because it can be changed into a prime (220421064631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8398632 + ... + 8424835.

It is an arithmetic number, because the mean of its divisors is an integer number (41335260876).

Almost surely, 2^220421064634 is an apocalyptic number.

220421064634 is a deficient number, since it is larger than the sum of its proper divisors (110261022374).

220421064634 is a wasteful number, since it uses less digits than its factorization.

220421064634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830020.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 220421064634 its reverse (436460124022), we get a palindrome (656881188656).

The spelling of 220421064634 in words is "two hundred twenty billion, four hundred twenty-one million, sixty-four thousand, six hundred thirty-four".