61420324020 has 192 divisors, whose sum is σ = 189887991552. Its totient is φ = 14709760000.

The previous prime is 61420323997. The next prime is 61420324037. The reversal of 61420324020 is 2042302416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45128140 + ... + 45129500.

It is an arithmetic number, because the mean of its divisors is an integer number (988999956).

Almost surely, 2^61420324020 is an apocalyptic number.

61420324020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61420324020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94943995776).

61420324020 is an abundant number, since it is smaller than the sum of its proper divisors (128467667532).

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

61420324020 is a wasteful number, since it uses less digits than its factorization.

61420324020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 61420324020 its reverse (2042302416), we get a palindrome (63462626436).

The spelling of 61420324020 in words is "sixty-one billion, four hundred twenty million, three hundred twenty-four thousand, twenty".