20400213020025 has 48 divisors (see below), whose sum is σ = 33838772054976. Its totient is φ = 10844499793920.

The previous prime is 20400213020009. The next prime is 20400213020093. The reversal of 20400213020025 is 52002031200402.

It is not a de Polignac number, because 20400213020025 - 2⁴ = 20400213020009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20400213019983 and 20400213020010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396302689 + ... + 396354161.

It is an arithmetic number, because the mean of its divisors is an integer number (704974417812).

Almost surely, 2^{20400213020025} is an apocalyptic number.

20400213020025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20400213020025 is a deficient number, since it is larger than the sum of its proper divisors (13438559034951).

20400213020025 is a wasteful number, since it uses less digits than its factorization.

20400213020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68682 (or 68677 counting only the distinct ones).

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

Adding to 20400213020025 its reverse (52002031200402), we get a palindrome (72402244220427).

The spelling of 20400213020025 in words is "twenty trillion, four hundred billion, two hundred thirteen million, twenty thousand, twenty-five".