15420500212020 has 24 divisors (see below), whose sum is σ = 43177400593824. Its totient is φ = 4112133389856.

The previous prime is 15420500211959. The next prime is 15420500212049. The reversal of 15420500212020 is 2021200502451.

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, 128504168374 + ... + 128504168493.

It is an arithmetic number, because the mean of its divisors is an integer number (1799058358076).

Almost surely, 2^{15420500212020} is an apocalyptic number.

15420500212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15420500212020 is an abundant number, since it is smaller than the sum of its proper divisors (27756900381804).

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

15420500212020 is a wasteful number, since it uses less digits than its factorization.

15420500212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257008336879 (or 257008336877 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 15420500212020 its reverse (2021200502451), we get a palindrome (17441700714471).

The spelling of 15420500212020 in words is "fifteen trillion, four hundred twenty billion, five hundred million, two hundred twelve thousand, twenty".