31400021034020 has 24 divisors (see below), whose sum is σ = 65940336667968. Its totient is φ = 12559952700000.

The previous prime is 31400021033963. The next prime is 31400021034023. The reversal of 31400021034020 is 2043012000413.

It is a super-2 number, since 2×31400021034020² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31400021033983 and 31400021034001.

It is not an unprimeable number, because it can be changed into a prime (31400021034023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299545 + ... + 8030495.

It is an arithmetic number, because the mean of its divisors is an integer number (2747514027832).

Almost surely, 2^{31400021034020} is an apocalyptic number.

It is an amenable number.

31400021034020 is an abundant number, since it is smaller than the sum of its proper divisors (34540315633948).

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

31400021034020 is a wasteful number, since it uses less digits than its factorization.

31400021034020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964211 (or 6964209 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31400021034020 its reverse (2043012000413), we get a palindrome (33443033034433).

The spelling of 31400021034020 in words is "thirty-one trillion, four hundred billion, twenty-one million, thirty-four thousand, twenty".