20423121020210 has 16 divisors (see below), whose sum is σ = 37174669723800. Its totient is φ = 8077459099776.

The previous prime is 20423121020179. The next prime is 20423121020231. The reversal of 20423121020210 is 1202012132402.

It can be written as a sum of positive squares in 4 ways, for example, as 14355013017601 + 6068108002609 = 3788801^2 + 2463353^2 .

It is a super-2 number, since 2×20423121020210² (a number of 27 digits) contains 22 as substring.

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, 11473662605 + ... + 11473664384.

Almost surely, 2^{20423121020210} is an apocalyptic number.

20423121020210 is a deficient number, since it is larger than the sum of its proper divisors (16751548703590).

20423121020210 is a wasteful number, since it uses less digits than its factorization.

20423121020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22947327085.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20423121020210 its reverse (1202012132402), we get a palindrome (21625133152612).

The spelling of 20423121020210 in words is "twenty trillion, four hundred twenty-three billion, one hundred twenty-one million, twenty thousand, two hundred ten".