20402707025 has 12 divisors (see below), whose sum is σ = 25405219200. Its totient is φ = 16253867280.

The previous prime is 20402707019. The next prime is 20402707033. The reversal of 20402707025 is 52070720402.

It is not a de Polignac number, because 20402707025 - 2¹⁶ = 20402641489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701365 + ... + 1713314.

It is an arithmetic number, because the mean of its divisors is an integer number (2117101600).

Almost surely, 2^20402707025 is an apocalyptic number.

20402707025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20402707025 is a deficient number, since it is larger than the sum of its proper divisors (5002512175).

20402707025 is a wasteful number, since it uses less digits than its factorization.

20402707025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414928 (or 3414923 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The spelling of 20402707025 in words is "twenty billion, four hundred two million, seven hundred seven thousand, twenty-five".