920111001820 has 48 divisors (see below), whose sum is σ = 2036576273760. Its totient is φ = 348648425216.

The previous prime is 920111001757. The next prime is 920111001833. The reversal of 920111001820 is 28100111029.

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, 14935282 + ... + 14996761.

It is an arithmetic number, because the mean of its divisors is an integer number (42428672370).

Almost surely, 2^920111001820 is an apocalyptic number.

It is an amenable number.

920111001820 is an abundant number, since it is smaller than the sum of its proper divisors (1116465271940).

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

920111001820 is a wasteful number, since it uses less digits than its factorization.

920111001820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29932134 (or 29932132 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 920111001820 its reverse (28100111029), we get a palindrome (948211112849).

The spelling of 920111001820 in words is "nine hundred twenty billion, one hundred eleven million, one thousand, eight hundred twenty".