20200402515 has 16 divisors (see below), whose sum is σ = 32803043328. Its totient is φ = 10612748256.

The previous prime is 20200402513. The next prime is 20200402531. The reversal of 20200402515 is 51520400202.

It is a happy number.

It is not a de Polignac number, because 20200402515 - 2¹ = 20200402513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20200402491 and 20200402500.

It is not an unprimeable number, because it can be changed into a prime (20200402511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10048947 + ... + 10050956.

It is an arithmetic number, because the mean of its divisors is an integer number (2050190208).

Almost surely, 2^20200402515 is an apocalyptic number.

20200402515 is a deficient number, since it is larger than the sum of its proper divisors (12602640813).

20200402515 is a wasteful number, since it uses less digits than its factorization.

20200402515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20099978.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20200402515 its reverse (51520400202), we get a palindrome (71720802717).

The spelling of 20200402515 in words is "twenty billion, two hundred million, four hundred two thousand, five hundred fifteen".