1029961881020 has 48 divisors (see below), whose sum is σ = 2167850442240. Its totient is φ = 411046000704.

The previous prime is 1029961880993. The next prime is 1029961881023. The reversal of 1029961881020 is 201881699201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029961881023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57252467 + ... + 57270453.

It is an arithmetic number, because the mean of its divisors is an integer number (45163550880).

Almost surely, 2^{1029961881020} is an apocalyptic number.

1029961881020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1029961881020 is an abundant number, since it is smaller than the sum of its proper divisors (1137888561220).

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

1029961881020 is a wasteful number, since it uses less digits than its factorization.

1029961881020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24362 (or 24360 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 47.

The spelling of 1029961881020 in words is "one trillion, twenty-nine billion, nine hundred sixty-one million, eight hundred eighty-one thousand, twenty".