20401020345 has 32 divisors (see below), whose sum is σ = 32965954560. Its totient is φ = 10772913600.

The previous prime is 20401020317. The next prime is 20401020359. The reversal of 20401020345 is 54302010402.

It is not a de Polignac number, because 20401020345 - 2⁶ = 20401020281 is a prime.

It is a super-2 number, since 2×20401020345² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 680686 + ... + 710024.

It is an arithmetic number, because the mean of its divisors is an integer number (1030186080).

Almost surely, 2^20401020345 is an apocalyptic number.

It is an amenable number.

20401020345 is a deficient number, since it is larger than the sum of its proper divisors (12564934215).

20401020345 is a wasteful number, since it uses less digits than its factorization.

20401020345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29805.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 20401020345 its reverse (54302010402), we get a palindrome (74703030747).

The spelling of 20401020345 in words is "twenty billion, four hundred one million, twenty thousand, three hundred forty-five".