20461212420 has 96 divisors (see below), whose sum is σ = 62525675520. Its totient is φ = 4958232960.

The previous prime is 20461212419. The next prime is 20461212433. The reversal of 20461212420 is 2421216402.

It is a happy number.

It is a super-2 number, since 2×20461212420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2109141 + ... + 2118819.

It is an arithmetic number, because the mean of its divisors is an integer number (651309120).

Almost surely, 2^20461212420 is an apocalyptic number.

20461212420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20461212420 is an abundant number, since it is smaller than the sum of its proper divisors (42064463100).

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

20461212420 is a wasteful number, since it uses less digits than its factorization.

20461212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12905 (or 12903 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20461212420 its reverse (2421216402), we get a palindrome (22882428822).

The spelling of 20461212420 in words is "twenty billion, four hundred sixty-one million, two hundred twelve thousand, four hundred twenty".