1020615720020 has 48 divisors (see below), whose sum is σ = 2335970931840. Its totient is φ = 372302445696.

The previous prime is 1020615719887. The next prime is 1020615720097. The reversal of 1020615720020 is 200275160201.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23625680 + ... + 23668839.

It is an arithmetic number, because the mean of its divisors is an integer number (48666061080).

Almost surely, 2^{1020615720020} is an apocalyptic number.

1020615720020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020615720020 is an abundant number, since it is smaller than the sum of its proper divisors (1315355211820).

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

1020615720020 is a wasteful number, since it uses less digits than its factorization.

1020615720020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47294624 (or 47294622 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The spelling of 1020615720020 in words is "one trillion, twenty billion, six hundred fifteen million, seven hundred twenty thousand, twenty".